30961605 has 16 divisors (see below), whose sum is σ = 49705344. Its totient is φ = 16457280.

The previous prime is 30961597. The next prime is 30961613. The reversal of 30961605 is 50616903.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (30961597) and next prime (30961613).

It is not a de Polignac number, because 30961605 - 2³ = 30961597 is a prime.

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, 1347 + ... + 7983.

It is an arithmetic number, because the mean of its divisors is an integer number (3106584).

Almost surely, 2^30961605 is an apocalyptic number.

It is an amenable number.

30961605 is a deficient number, since it is larger than the sum of its proper divisors (18743739).

30961605 is a wasteful number, since it uses less digits than its factorization.

30961605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6956.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 30961605 is about 5564.3153217624. The cubic root of 30961605 is about 314.0083199278.

The spelling of 30961605 in words is "thirty million, nine hundred sixty-one thousand, six hundred five".