13581879 has 4 divisors (see below), whose sum is σ = 18109176. Its totient is φ = 9054584.

The previous prime is 13581863. The next prime is 13581899. The reversal of 13581879 is 97818531.

13581879 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13581879 - 2⁴ = 13581863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13581879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13581839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2263644 + ... + 2263649.

It is an arithmetic number, because the mean of its divisors is an integer number (4527294).

Almost surely, 2^13581879 is an apocalyptic number.

13581879 is a deficient number, since it is larger than the sum of its proper divisors (4527297).

13581879 is an equidigital number, since it uses as much as digits as its factorization.

13581879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4527296.

The product of its digits is 60480, while the sum is 42.

The square root of 13581879 is about 3685.3600909545. The cubic root of 13581879 is about 238.5905760249.

The spelling of 13581879 in words is "thirteen million, five hundred eighty-one thousand, eight hundred seventy-nine".