13909869 has 12 divisors (see below), whose sum is σ = 20238400. Its totient is φ = 9205704.

The previous prime is 13909849. The next prime is 13909873. The reversal of 13909869 is 96890931.

It is not a de Polignac number, because 13909869 - 2⁵ = 13909837 is a prime.

It is a super-2 number, since 2×13909869² = 386968911194322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13909829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4309 + ... + 6810.

Almost surely, 2^13909869 is an apocalyptic number.

It is an amenable number.

13909869 is a deficient number, since it is larger than the sum of its proper divisors (6328531).

13909869 is a wasteful number, since it uses less digits than its factorization.

13909869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11264 (or 11261 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 13909869 is about 3729.5936776008. The cubic root of 13909869 is about 240.4959017171.

The spelling of 13909869 in words is "thirteen million, nine hundred nine thousand, eight hundred sixty-nine".