13487879 has 2 divisors, whose sum is σ = 13487880. Its totient is φ = 13487878.

The previous prime is 13487863. The next prime is 13487899. The reversal of 13487879 is 97878431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13487879 - 2⁴ = 13487863 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13487819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6743939 + 6743940.

It is an arithmetic number, because the mean of its divisors is an integer number (6743940).

Almost surely, 2^13487879 is an apocalyptic number.

13487879 is a deficient number, since it is larger than the sum of its proper divisors (1).

13487879 is an equidigital number, since it uses as much as digits as its factorization.

13487879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 47.

The square root of 13487879 is about 3672.5847845897. The cubic root of 13487879 is about 238.0388739081.

The spelling of 13487879 in words is "thirteen million, four hundred eighty-seven thousand, eight hundred seventy-nine".