13929909 has 16 divisors (see below), whose sum is σ = 21288960. Its totient is φ = 7936560.

The previous prime is 13929887. The next prime is 13929913. The reversal of 13929909 is 90992931.

It is a happy number.

It is not a de Polignac number, because 13929909 - 2⁷ = 13929781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13929989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8464 + ... + 9974.

It is an arithmetic number, because the mean of its divisors is an integer number (1330560).

Almost surely, 2^13929909 is an apocalyptic number.

It is an amenable number.

13929909 is a deficient number, since it is larger than the sum of its proper divisors (7359051).

13929909 is a wasteful number, since it uses less digits than its factorization.

13929909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1960.

The product of its (nonzero) digits is 39366, while the sum is 42.

The square root of 13929909 is about 3732.2793303824. The cubic root of 13929909 is about 240.6113407437.

The spelling of 13929909 in words is "thirteen million, nine hundred twenty-nine thousand, nine hundred nine".