30906931 has 8 divisors (see below), whose sum is σ = 34270128. Its totient is φ = 27636000.

The previous prime is 30906929. The next prime is 30906937. The reversal of 30906931 is 13960903.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30906931 - 2¹ = 30906929 is a prime.

It is a super-2 number, since 2×30906931² = 1910476767677522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30906893 and 30906902.

It is not an unprimeable number, because it can be changed into a prime (30906937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22360 + ... + 23701.

It is an arithmetic number, because the mean of its divisors is an integer number (4283766).

Almost surely, 2^30906931 is an apocalyptic number.

30906931 is a deficient number, since it is larger than the sum of its proper divisors (3363197).

30906931 is a wasteful number, since it uses less digits than its factorization.

30906931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46133.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 30906931 is about 5559.4002374357. The cubic root of 30906931 is about 313.8233789736.

The spelling of 30906931 in words is "thirty million, nine hundred six thousand, nine hundred thirty-one".