13887909 has 32 divisors (see below), whose sum is σ = 23696640. Its totient is φ = 7874496.

The previous prime is 13887901. The next prime is 13887911. The reversal of 13887909 is 90978831.

It is not a de Polignac number, because 13887909 - 2³ = 13887901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13887901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37047 + ... + 37419.

It is an arithmetic number, because the mean of its divisors is an integer number (740520).

Almost surely, 2^13887909 is an apocalyptic number.

It is an amenable number.

13887909 is a deficient number, since it is larger than the sum of its proper divisors (9808731).

13887909 is a wasteful number, since it uses less digits than its factorization.

13887909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586 (or 580 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 13887909 is about 3726.6484942908. The cubic root of 13887909 is about 240.3692752743.

The spelling of 13887909 in words is "thirteen million, eight hundred eighty-seven thousand, nine hundred nine".