13138591 has 2 divisors, whose sum is σ = 13138592. Its totient is φ = 13138590.

The previous prime is 13138579. The next prime is 13138639. The reversal of 13138591 is 19583131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13138591 - 2¹³ = 13130399 is a prime.

It is a super-3 number, since 3×13138591³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13138511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6569295 + 6569296.

It is an arithmetic number, because the mean of its divisors is an integer number (6569296).

Almost surely, 2^13138591 is an apocalyptic number.

13138591 is a deficient number, since it is larger than the sum of its proper divisors (1).

13138591 is an equidigital number, since it uses as much as digits as its factorization.

13138591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 31.

The square root of 13138591 is about 3624.7194374186. The cubic root of 13138591 is about 235.9660908381.

The spelling of 13138591 in words is "thirteen million, one hundred thirty-eight thousand, five hundred ninety-one".