13990437 has 12 divisors (see below), whose sum is σ = 20678944. Its totient is φ = 9109800.

The previous prime is 13990433. The next prime is 13990451. The reversal of 13990437 is 73409931.

13990437 is a `hidden beast` number, since 139 + 90 + 437 = 666.

It is not a de Polignac number, because 13990437 - 2² = 13990433 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 (13990433) 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 11 ways as a sum of consecutive naturals, for example, 17689 + ... + 18462.

Almost surely, 2^13990437 is an apocalyptic number.

It is an amenable number.

13990437 is a deficient number, since it is larger than the sum of its proper divisors (6688507).

13990437 is a wasteful number, since it uses less digits than its factorization.

13990437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36200 (or 36197 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 36.

The square root of 13990437 is about 3740.3792588453. The cubic root of 13990437 is about 240.9593372739.

The spelling of 13990437 in words is "thirteen million, nine hundred ninety thousand, four hundred thirty-seven".