13974639 has 16 divisors (see below), whose sum is σ = 22221312. Its totient is φ = 7638048.

The previous prime is 13974601. The next prime is 13974661. The reversal of 13974639 is 93647931.

It is not a de Polignac number, because 13974639 - 2¹² = 13970543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13974639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13974679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13984 + ... + 14949.

It is an arithmetic number, because the mean of its divisors is an integer number (1388832).

Almost surely, 2^13974639 is an apocalyptic number.

13974639 is a deficient number, since it is larger than the sum of its proper divisors (8246673).

13974639 is a wasteful number, since it uses less digits than its factorization.

13974639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28966.

The product of its digits is 122472, while the sum is 42.

The square root of 13974639 is about 3738.2668444080. The cubic root of 13974639 is about 240.8686060279.

The spelling of 13974639 in words is "thirteen million, nine hundred seventy-four thousand, six hundred thirty-nine".