30868931 has 2 divisors, whose sum is σ = 30868932. Its totient is φ = 30868930.

The previous prime is 30868897. The next prime is 30868961. The reversal of 30868931 is 13986803.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30868931 is a prime.

It is a super-2 number, since 2×30868931² = 1905781802165522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30868961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15434465 + 15434466.

It is an arithmetic number, because the mean of its divisors is an integer number (15434466).

Almost surely, 2^30868931 is an apocalyptic number.

30868931 is a deficient number, since it is larger than the sum of its proper divisors (1).

30868931 is an equidigital number, since it uses as much as digits as its factorization.

30868931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 30868931 is about 5555.9815514453. The cubic root of 30868931 is about 313.6947111880.

The spelling of 30868931 in words is "thirty million, eight hundred sixty-eight thousand, nine hundred thirty-one".