13390087 has 4 divisors (see below), whose sum is σ = 13515336. Its totient is φ = 13264840.

The previous prime is 13390051. The next prime is 13390099. The reversal of 13390087 is 78009331.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13390087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13390037) 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, 62464 + ... + 62677.

It is an arithmetic number, because the mean of its divisors is an integer number (3378834).

Almost surely, 2^13390087 is an apocalyptic number.

13390087 is a deficient number, since it is larger than the sum of its proper divisors (125249).

13390087 is a wasteful number, since it uses less digits than its factorization.

13390087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125248.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 13390087 is about 3659.2467804181. The cubic root of 13390087 is about 237.4621886250.

The spelling of 13390087 in words is "thirteen million, three hundred ninety thousand, eighty-seven".