13936591 has 2 divisors, whose sum is σ = 13936592. Its totient is φ = 13936590.

The previous prime is 13936579. The next prime is 13936607. The reversal of 13936591 is 19563931.

It is a weak prime.

It is an emirp because it is prime and its reverse (19563931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13936591 - 2⁷ = 13936463 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13936591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13936691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6968295 + 6968296.

It is an arithmetic number, because the mean of its divisors is an integer number (6968296).

Almost surely, 2^13936591 is an apocalyptic number.

13936591 is a deficient number, since it is larger than the sum of its proper divisors (1).

13936591 is an equidigital number, since it uses as much as digits as its factorization.

13936591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21870, while the sum is 37.

The square root of 13936591 is about 3733.1743864974. The cubic root of 13936591 is about 240.6498073260.

The spelling of 13936591 in words is "thirteen million, nine hundred thirty-six thousand, five hundred ninety-one".