13772979 has 12 divisors (see below), whose sum is σ = 21703032. Its totient is φ = 8347200.

The previous prime is 13772977. The next prime is 13773013. The reversal of 13772979 is 97927731.

It is not a de Polignac number, because 13772979 - 2¹ = 13772977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13772971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69462 + ... + 69659.

It is an arithmetic number, because the mean of its divisors is an integer number (1808586).

Almost surely, 2^13772979 is an apocalyptic number.

13772979 is a deficient number, since it is larger than the sum of its proper divisors (7930053).

13772979 is a wasteful number, since it uses less digits than its factorization.

13772979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139138 (or 139135 counting only the distinct ones).

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

The square root of 13772979 is about 3711.1964378082. The cubic root of 13772979 is about 239.7043755921.

It can be divided in two parts, 1377 and 2979, that added together give a square (4356 = 66²).

The spelling of 13772979 in words is "thirteen million, seven hundred seventy-two thousand, nine hundred seventy-nine".