697431 has 8 divisors (see below), whose sum is σ = 1062784. Its totient is φ = 398520.

The previous prime is 697423. The next prime is 697441. The reversal of 697431 is 134796.

It is a happy number.

697431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 697431 - 2³ = 697423 is a prime.

It is a super-2 number, since 2×697431² = 972819999522, which contains 22 as substring.

It is a Duffinian number.

697431 is a lucky number.

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 697431.

It is not an unprimeable number, because it can be changed into a prime (697441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16585 + ... + 16626.

It is an arithmetic number, because the mean of its divisors is an integer number (132848).

2⁶⁹⁷⁴³¹ is an apocalyptic number.

697431 is a deficient number, since it is larger than the sum of its proper divisors (365353).

697431 is a wasteful number, since it uses less digits than its factorization.

697431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33221.

The product of its digits is 4536, while the sum is 30.

The square root of 697431 is about 835.1233441834. The cubic root of 697431 is about 88.6816467677.

It can be divided in two parts, 697 and 431, that added together give a triangular number (1128 = T₄₇).

The spelling of 697431 in words is "six hundred ninety-seven thousand, four hundred thirty-one".