30864731 has 2 divisors, whose sum is σ = 30864732. Its totient is φ = 30864730.

The previous prime is 30864703. The next prime is 30864733. The reversal of 30864731 is 13746803.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30864731 - 2⁶ = 30864667 is a prime.

It is a super-2 number, since 2×30864731² = 1905263239404722, which contains 22 as substring.

Together with 30864733, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30864733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15432365 + 15432366.

It is an arithmetic number, because the mean of its divisors is an integer number (15432366).

Almost surely, 2^30864731 is an apocalyptic number.

30864731 is a deficient number, since it is larger than the sum of its proper divisors (1).

30864731 is an equidigital number, since it uses as much as digits as its factorization.

30864731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 30864731 is about 5555.6035675703. The cubic root of 30864731 is about 313.6804835325.

The spelling of 30864731 in words is "thirty million, eight hundred sixty-four thousand, seven hundred thirty-one".