13909679 has 16 divisors (see below), whose sum is σ = 16416000. Its totient is φ = 11779992.

The previous prime is 13909673. The next prime is 13909699. The reversal of 13909679 is 97690931.

It is a happy number.

It is not a de Polignac number, because 13909679 - 2²⁰ = 12861103 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 (13909673) 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, 36512 + ... + 36890.

It is an arithmetic number, because the mean of its divisors is an integer number (1026000).

Almost surely, 2^13909679 is an apocalyptic number.

13909679 is a deficient number, since it is larger than the sum of its proper divisors (2506321).

13909679 is an equidigital number, since it uses as much as digits as its factorization.

13909679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 13909679 is about 3729.5682055702. The cubic root of 13909679 is about 240.4948067049.

The spelling of 13909679 in words is "thirteen million, nine hundred nine thousand, six hundred seventy-nine".