13908387 has 4 divisors (see below), whose sum is σ = 18544520. Its totient is φ = 9272256.

The previous prime is 13908383. The next prime is 13908409. The reversal of 13908387 is 78380931.

13908387 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13908387 - 2² = 13908383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13908383) 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, 2318062 + ... + 2318067.

It is an arithmetic number, because the mean of its divisors is an integer number (4636130).

Almost surely, 2^13908387 is an apocalyptic number.

13908387 is a deficient number, since it is larger than the sum of its proper divisors (4636133).

13908387 is an equidigital number, since it uses as much as digits as its factorization.

13908387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4636132.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 13908387 is about 3729.3949911480. The cubic root of 13908387 is about 240.4873603574.

The spelling of 13908387 in words is "thirteen million, nine hundred eight thousand, three hundred eighty-seven".