13731139 has 2 divisors, whose sum is σ = 13731140. Its totient is φ = 13731138.

The previous prime is 13731127. The next prime is 13731143. The reversal of 13731139 is 93113731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13731139 - 2¹⁵ = 13698371 is a prime.

It is not a weakly prime, because it can be changed into another prime (13731119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6865569 + 6865570.

It is an arithmetic number, because the mean of its divisors is an integer number (6865570).

Almost surely, 2^13731139 is an apocalyptic number.

13731139 is a deficient number, since it is larger than the sum of its proper divisors (1).

13731139 is an equidigital number, since it uses as much as digits as its factorization.

13731139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1701, while the sum is 28.

The square root of 13731139 is about 3705.5551540896. Note that the first 3 decimals coincide. The cubic root of 13731139 is about 239.4614021594.

The spelling of 13731139 in words is "thirteen million, seven hundred thirty-one thousand, one hundred thirty-nine".