13920431137 has 2 divisors, whose sum is σ = 13920431138. Its totient is φ = 13920431136.

The previous prime is 13920431089. The next prime is 13920431159. The reversal of 13920431137 is 73113402931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11663136016 + 2257295121 = 107996^2 + 47511^2 .

It is a cyclic number.

It is not a de Polignac number, because 13920431137 - 2³¹ = 11772947489 is a prime.

It is a super-2 number, since 2×13920431137² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13920434137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6960215568 + 6960215569.

It is an arithmetic number, because the mean of its divisors is an integer number (6960215569).

Almost surely, 2^13920431137 is an apocalyptic number.

It is an amenable number.

13920431137 is a deficient number, since it is larger than the sum of its proper divisors (1).

13920431137 is an equidigital number, since it uses as much as digits as its factorization.

13920431137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The spelling of 13920431137 in words is "thirteen billion, nine hundred twenty million, four hundred thirty-one thousand, one hundred thirty-seven".