13727979 has 6 divisors (see below), whose sum is σ = 19829316. Its totient is φ = 9151980.

The previous prime is 13727971. The next prime is 13727981. The reversal of 13727979 is 97972731.

13727979 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13727979 - 2³ = 13727971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13727971) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 762657 + ... + 762674.

It is an arithmetic number, because the mean of its divisors is an integer number (3304886).

Almost surely, 2^13727979 is an apocalyptic number.

13727979 is a deficient number, since it is larger than the sum of its proper divisors (6101337).

13727979 is a wasteful number, since it uses less digits than its factorization.

13727979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525337 (or 1525334 counting only the distinct ones).

The product of its digits is 166698, while the sum is 45.

The square root of 13727979 is about 3705.1287427025. The cubic root of 13727979 is about 239.4430313579.

It can be divided in two parts, 13727 and 979, that added together give a triangular number (14706 = T₁₇₁).

The spelling of 13727979 in words is "thirteen million, seven hundred twenty-seven thousand, nine hundred seventy-nine".