13909814 has 8 divisors (see below), whose sum is σ = 20923920. Its totient is φ = 6935176.

The previous prime is 13909813. The next prime is 13909829. The reversal of 13909814 is 41890931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13909813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8969 + ... + 10404.

It is an arithmetic number, because the mean of its divisors is an integer number (2615490).

Almost surely, 2^13909814 is an apocalyptic number.

13909814 is a deficient number, since it is larger than the sum of its proper divisors (7014106).

13909814 is a wasteful number, since it uses less digits than its factorization.

13909814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19734.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 13909814 is about 3729.5863041362. The cubic root of 13909814 is about 240.4955847409.

The spelling of 13909814 in words is "thirteen million, nine hundred nine thousand, eight hundred fourteen".