30917965 has 16 divisors (see below), whose sum is σ = 40271616. Its totient is φ = 22651200.

The previous prime is 30917941. The next prime is 30917981. The reversal of 30917965 is 56971903.

It is not a de Polignac number, because 30917965 - 2⁵ = 30917933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6700 + ... + 10330.

It is an arithmetic number, because the mean of its divisors is an integer number (2516976).

Almost surely, 2^30917965 is an apocalyptic number.

It is an amenable number.

30917965 is a deficient number, since it is larger than the sum of its proper divisors (9353651).

30917965 is a wasteful number, since it uses less digits than its factorization.

30917965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3780.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 30917965 is about 5560.3925221157. The cubic root of 30917965 is about 313.8607202760.

The spelling of 30917965 in words is "thirty million, nine hundred seventeen thousand, nine hundred sixty-five".