13538879 has 2 divisors, whose sum is σ = 13538880. Its totient is φ = 13538878.

The previous prime is 13538843. The next prime is 13538923. The reversal of 13538879 is 97883531.

It is a happy number.

It is an a-pointer prime, because the next prime (13538923) can be obtained adding 13538879 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13538879 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13538839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6769439 + 6769440.

It is an arithmetic number, because the mean of its divisors is an integer number (6769440).

Almost surely, 2^13538879 is an apocalyptic number.

13538879 is a deficient number, since it is larger than the sum of its proper divisors (1).

13538879 is an equidigital number, since it uses as much as digits as its factorization.

13538879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 44.

The square root of 13538879 is about 3679.5215721613. The cubic root of 13538879 is about 238.3385185868.

The spelling of 13538879 in words is "thirteen million, five hundred thirty-eight thousand, eight hundred seventy-nine".