30393931 has 2 divisors, whose sum is σ = 30393932. Its totient is φ = 30393930.

The previous prime is 30393911. The next prime is 30393941. The reversal of 30393931 is 13939303.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30393931 - 2⁵ = 30393899 is a prime.

It is a super-2 number, since 2×30393931² = 1847582083265522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 30393893 and 30393902.

It is not a weakly prime, because it can be changed into another prime (30393911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15196965 + 15196966.

It is an arithmetic number, because the mean of its divisors is an integer number (15196966).

Almost surely, 2^30393931 is an apocalyptic number.

30393931 is a deficient number, since it is larger than the sum of its proper divisors (1).

30393931 is an equidigital number, since it uses as much as digits as its factorization.

30393931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6561, while the sum is 31.

The square root of 30393931 is about 5513.0691089447. The cubic root of 30393931 is about 312.0773798594.

The spelling of 30393931 in words is "thirty million, three hundred ninety-three thousand, nine hundred thirty-one".