961607831 has 2 divisors, whose sum is σ = 961607832. Its totient is φ = 961607830.

The previous prime is 961607821. The next prime is 961607893. The reversal of 961607831 is 138706169.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 961607831 - 2¹⁴ = 961591447 is a prime.

It is a super-2 number, since 2×961607831² = 1849379241281049122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (961607821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480803915 + 480803916.

It is an arithmetic number, because the mean of its divisors is an integer number (480803916).

Almost surely, 2^961607831 is an apocalyptic number.

961607831 is a deficient number, since it is larger than the sum of its proper divisors (1).

961607831 is an equidigital number, since it uses as much as digits as its factorization.

961607831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 961607831 is about 31009.8021760862. The cubic root of 961607831 is about 987.0352520354.

The spelling of 961607831 in words is "nine hundred sixty-one million, six hundred seven thousand, eight hundred thirty-one".