13977879 has 4 divisors (see below), whose sum is σ = 18637176. Its totient is φ = 9318584.

The previous prime is 13977877. The next prime is 13977889. The reversal of 13977879 is 97877931.

It is a happy number.

13977879 is digitally balanced in base 2, 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 13977879 - 2¹ = 13977877 is a prime.

It is a super-2 number, since 2×13977879² = 390762202677282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13977871) 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, 2329644 + ... + 2329649.

It is an arithmetic number, because the mean of its divisors is an integer number (4659294).

Almost surely, 2^13977879 is an apocalyptic number.

13977879 is a deficient number, since it is larger than the sum of its proper divisors (4659297).

13977879 is an equidigital number, since it uses as much as digits as its factorization.

13977879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4659296.

The product of its digits is 666792, while the sum is 51.

The square root of 13977879 is about 3738.7001751946. The cubic root of 13977879 is about 240.8872196031.

The spelling of 13977879 in words is "thirteen million, nine hundred seventy-seven thousand, eight hundred seventy-nine".