30679931 has 6 divisors (see below), whose sum is σ = 31448196. Its totient is φ = 29930000.

The previous prime is 30679921. The next prime is 30679933. The reversal of 30679931 is 13997603.

It is not a de Polignac number, because 30679931 - 2⁶ = 30679867 is a prime.

It is a super-2 number, since 2×30679931² = 1882516332329522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30679933) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7445 + ... + 10806.

It is an arithmetic number, because the mean of its divisors is an integer number (5241366).

Almost surely, 2^30679931 is an apocalyptic number.

30679931 is a deficient number, since it is larger than the sum of its proper divisors (768265).

30679931 is an equidigital number, since it uses as much as digits as its factorization.

30679931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18333 (or 18292 counting only the distinct ones).

The product of its (nonzero) digits is 30618, while the sum is 38.

The square root of 30679931 is about 5538.9467410330. The cubic root of 30679931 is about 313.0531846597.

The spelling of 30679931 in words is "thirty million, six hundred seventy-nine thousand, nine hundred thirty-one".