13390287 has 16 divisors (see below), whose sum is σ = 18184320. Its totient is φ = 8763552.

The previous prime is 13390283. The next prime is 13390303. The reversal of 13390287 is 78209331.

It is not a de Polignac number, because 13390287 - 2² = 13390283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13390283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67873 + ... + 68069.

It is an arithmetic number, because the mean of its divisors is an integer number (1136520).

Almost surely, 2^13390287 is an apocalyptic number.

13390287 is a deficient number, since it is larger than the sum of its proper divisors (4794033).

13390287 is a wasteful number, since it uses less digits than its factorization.

13390287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 13390287 is about 3659.2741083444. The cubic root of 13390287 is about 237.4633708977.

The spelling of 13390287 in words is "thirteen million, three hundred ninety thousand, two hundred eighty-seven".