13775879 has 4 divisors (see below), whose sum is σ = 14835576. Its totient is φ = 12716184.

The previous prime is 13775863. The next prime is 13775887. The reversal of 13775879 is 97857731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97857731 = 31 ⋅3156701.

It is not a de Polignac number, because 13775879 - 2⁴ = 13775863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13775479) 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, 529829 + ... + 529854.

It is an arithmetic number, because the mean of its divisors is an integer number (3708894).

Almost surely, 2^13775879 is an apocalyptic number.

13775879 is a deficient number, since it is larger than the sum of its proper divisors (1059697).

13775879 is a wasteful number, since it uses less digits than its factorization.

13775879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059696.

The product of its digits is 370440, while the sum is 47.

The square root of 13775879 is about 3711.5871268232. The cubic root of 13775879 is about 239.7211982394.

The spelling of 13775879 in words is "thirteen million, seven hundred seventy-five thousand, eight hundred seventy-nine".