30313991 has 2 divisors, whose sum is σ = 30313992. Its totient is φ = 30313990.

The previous prime is 30313981. The next prime is 30314017. The reversal of 30313991 is 19931303.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30313991 - 2¹⁰ = 30312967 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30313981) 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, 15156995 + 15156996.

It is an arithmetic number, because the mean of its divisors is an integer number (15156996).

Almost surely, 2^30313991 is an apocalyptic number.

30313991 is a deficient number, since it is larger than the sum of its proper divisors (1).

30313991 is an equidigital number, since it uses as much as digits as its factorization.

30313991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2187, while the sum is 29.

The square root of 30313991 is about 5505.8142903661. The cubic root of 30313991 is about 311.8035382444.

The spelling of 30313991 in words is "thirty million, three hundred thirteen thousand, nine hundred ninety-one".