30312997937 has 2 divisors, whose sum is σ = 30312997938. Its totient is φ = 30312997936.

The previous prime is 30312997927. The next prime is 30312998033. The reversal of 30312997937 is 73979921303.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28077694096 + 2235303841 = 167564^2 + 47279^2 .

It is an emirp because it is prime and its reverse (73979921303) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30312997937 - 2⁶ = 30312997873 is a prime.

It is not a weakly prime, because it can be changed into another prime (30312997907) 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, 15156498968 + 15156498969.

It is an arithmetic number, because the mean of its divisors is an integer number (15156498969).

Almost surely, 2^30312997937 is an apocalyptic number.

It is an amenable number.

30312997937 is a deficient number, since it is larger than the sum of its proper divisors (1).

30312997937 is an equidigital number, since it uses as much as digits as its factorization.

30312997937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1928934, while the sum is 53.

The spelling of 30312997937 in words is "thirty billion, three hundred twelve million, nine hundred ninety-seven thousand, nine hundred thirty-seven".