961609975 has 6 divisors (see below), whose sum is σ = 1192396400. Its totient is φ = 769287960.

The previous prime is 961609951. The next prime is 961610011. The reversal of 961609975 is 579906169.

It is not a de Polignac number, because 961609975 - 2¹⁵ = 961577207 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19232175 + ... + 19232224.

Almost surely, 2^961609975 is an apocalyptic number.

961609975 is a deficient number, since it is larger than the sum of its proper divisors (230786425).

961609975 is a wasteful number, since it uses less digits than its factorization.

961609975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38464409 (or 38464404 counting only the distinct ones).

The product of its (nonzero) digits is 918540, while the sum is 52.

The square root of 961609975 is about 31009.8367457812. The cubic root of 961609975 is about 987.0359855992.

The spelling of 961609975 in words is "nine hundred sixty-one million, six hundred nine thousand, nine hundred seventy-five".