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694431 = 321931131
BaseRepresentation
bin10101001100010011111
31022021120200
42221202133
5134210211
622514543
75621403
oct2514237
91267520
10694431
11434811
12295a53
131b410a
14141103
15dab56
hexa989f

694431 has 24 divisors (see below), whose sum is σ = 1098240. Its totient is φ = 421200.

The previous prime is 694427. The next prime is 694457. The reversal of 694431 is 134496.

694431 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

694431 is a nontrivial binomial coefficient, being equal to C(1179, 2).

It is not a de Polignac number, because 694431 - 22 = 694427 is a prime.

It is a super-2 number, since 2×6944312 = 964468827522, which contains 22 as substring.

694431 is strictly pandigital in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 694395 and 694404.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 694431.

It is not an unprimeable number, because it can be changed into a prime (694471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5236 + ... + 5366.

It is an arithmetic number, because the mean of its divisors is an integer number (45760).

2694431 is an apocalyptic number.

694431 is the 1178-th triangular number.

694431 is a deficient number, since it is larger than the sum of its proper divisors (403809).

694431 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (694430) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (184).

694431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 184 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 694431 is about 833.3252666276. The cubic root of 694431 is about 88.5543092874.

The spelling of 694431 in words is "six hundred ninety-four thousand, four hundred thirty-one".