13668739 has 16 divisors (see below), whose sum is σ = 16538112. Its totient is φ = 11043648.

The previous prime is 13668727. The next prime is 13668749. The reversal of 13668739 is 93786631.

It is not a de Polignac number, because 13668739 - 2⁹ = 13668227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13668695 and 13668704.

It is not an unprimeable number, because it can be changed into a prime (13668719) 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, 11172 + ... + 12334.

It is an arithmetic number, because the mean of its divisors is an integer number (1033632).

Almost surely, 2^13668739 is an apocalyptic number.

13668739 is a deficient number, since it is larger than the sum of its proper divisors (2869373).

13668739 is a wasteful number, since it uses less digits than its factorization.

13668739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266.

The product of its digits is 163296, while the sum is 43.

The square root of 13668739 is about 3697.1257755181. The cubic root of 13668739 is about 239.0981139276.

The spelling of 13668739 in words is "thirteen million, six hundred sixty-eight thousand, seven hundred thirty-nine".