961910657 has 4 divisors (see below), whose sum is σ = 995080020. Its totient is φ = 928741296.

The previous prime is 961910617. The next prime is 961910671. The reversal of 961910657 is 756019169.

It is a happy number.

961910657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 288456256 + 673454401 = 16984^2 + 25951^2 .

It is a cyclic number.

It is not a de Polignac number, because 961910657 - 2⁸ = 961910401 is a prime.

It is a super-2 number, since 2×961910657² = 1850544224100343298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (961910617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16584638 + ... + 16584695.

It is an arithmetic number, because the mean of its divisors is an integer number (248770005).

Almost surely, 2^961910657 is an apocalyptic number.

It is an amenable number.

961910657 is a deficient number, since it is larger than the sum of its proper divisors (33169363).

961910657 is a wasteful number, since it uses less digits than its factorization.

961910657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33169362.

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 961910657 is about 31014.6845381345. The cubic root of 961910657 is about 987.1388523310.

The spelling of 961910657 in words is "nine hundred sixty-one million, nine hundred ten thousand, six hundred fifty-seven".