Search a number
-
+
695641 is a prime number
BaseRepresentation
bin10101001110101011001
31022100020111
42221311121
5134230031
622524321
75625052
oct2516531
91270214
10695641
11435711
122966a1
131b482b
14141729
15db1b1
hexa9d59

695641 has 2 divisors, whose sum is σ = 695642. Its totient is φ = 695640.

The previous prime is 695627. The next prime is 695659. The reversal of 695641 is 146596.

It is the 341-st star number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 518400 + 177241 = 720^2 + 421^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-695641 is a prime.

It is not a weakly prime, because it can be changed into another prime (695621) 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 as a sum of consecutive naturals, namely, 347820 + 347821.

It is an arithmetic number, because the mean of its divisors is an integer number (347821).

2695641 is an apocalyptic number.

695641 is the 528-th centered pentagonal number.

It is an amenable number.

695641 is a deficient number, since it is larger than the sum of its proper divisors (1).

695641 is an equidigital number, since it uses as much as digits as its factorization.

695641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 31.

The square root of 695641 is about 834.0509576758. The cubic root of 695641 is about 88.6057127818.

Subtracting from 695641 its sum of digits (31), we obtain a triangular number (695610 = T1179).

The spelling of 695641 in words is "six hundred ninety-five thousand, six hundred forty-one".