31013312089 has 2 divisors, whose sum is σ = 31013312090. Its totient is φ = 31013312088.

The previous prime is 31013312081. The next prime is 31013312093. The reversal of 31013312089 is 98021331013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30478176400 + 535135689 = 174580^2 + 23133^2 .

It is a cyclic number.

It is not a de Polignac number, because 31013312089 - 2³ = 31013312081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31013312089.

It is not a weakly prime, because it can be changed into another prime (31013312081) 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, 15506656044 + 15506656045.

It is an arithmetic number, because the mean of its divisors is an integer number (15506656045).

Almost surely, 2^31013312089 is an apocalyptic number.

It is an amenable number.

31013312089 is a deficient number, since it is larger than the sum of its proper divisors (1).

31013312089 is an equidigital number, since it uses as much as digits as its factorization.

31013312089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 31013312089 in words is "thirty-one billion, thirteen million, three hundred twelve thousand, eighty-nine".