13939364437 has 2 divisors, whose sum is σ = 13939364438. Its totient is φ = 13939364436.

The previous prime is 13939364401. The next prime is 13939364441. The reversal of 13939364437 is 73446393931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13261595281 + 677769156 = 115159^2 + 26034^2 .

It is a cyclic number.

It is not a de Polignac number, because 13939364437 - 2²⁷ = 13805146709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13939364447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6969682218 + 6969682219.

It is an arithmetic number, because the mean of its divisors is an integer number (6969682219).

Almost surely, 2^13939364437 is an apocalyptic number.

It is an amenable number.

13939364437 is a deficient number, since it is larger than the sum of its proper divisors (1).

13939364437 is an equidigital number, since it uses as much as digits as its factorization.

13939364437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4408992, while the sum is 52.

The spelling of 13939364437 in words is "thirteen billion, nine hundred thirty-nine million, three hundred sixty-four thousand, four hundred thirty-seven".