30699731 has 2 divisors, whose sum is σ = 30699732. Its totient is φ = 30699730.

The previous prime is 30699701. The next prime is 30699737. The reversal of 30699731 is 13799603.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30699731 is a prime.

It is a super-2 number, since 2×30699731² = 1884946966944722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30699737) 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, 15349865 + 15349866.

It is an arithmetic number, because the mean of its divisors is an integer number (15349866).

Almost surely, 2^30699731 is an apocalyptic number.

30699731 is a deficient number, since it is larger than the sum of its proper divisors (1).

30699731 is an equidigital number, since it uses as much as digits as its factorization.

30699731 is an odious number, because the sum of its binary digits is odd.

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

The square root of 30699731 is about 5540.7337961682. The cubic root of 30699731 is about 313.1205155380.

The spelling of 30699731 in words is "thirty million, six hundred ninety-nine thousand, seven hundred thirty-one".