31013023189 has 2 divisors, whose sum is σ = 31013023190. Its totient is φ = 31013023188.

The previous prime is 31013023187. The next prime is 31013023207. The reversal of 31013023189 is 98132031013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27061895025 + 3951128164 = 164505^2 + 62858^2 .

It is a cyclic number.

It is not a de Polignac number, because 31013023189 - 2¹ = 31013023187 is a prime.

Together with 31013023187, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 31013023189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31013023187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15506511594 + 15506511595.

It is an arithmetic number, because the mean of its divisors is an integer number (15506511595).

Almost surely, 2^31013023189 is an apocalyptic number.

It is an amenable number.

31013023189 is a deficient number, since it is larger than the sum of its proper divisors (1).

31013023189 is an equidigital number, since it uses as much as digits as its factorization.

31013023189 is an evil number, because the sum of its binary digits is even.

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

The spelling of 31013023189 in words is "thirty-one billion, thirteen million, twenty-three thousand, one hundred eighty-nine".