13690931 has 4 divisors (see below), whose sum is σ = 13878552. Its totient is φ = 13503312.

The previous prime is 13690889. The next prime is 13690939. The reversal of 13690931 is 13909631.

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-13690931 is a prime.

It is a super-2 number, since 2×13690931² = 374883183293522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13690939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93701 + ... + 93846.

It is an arithmetic number, because the mean of its divisors is an integer number (3469638).

Almost surely, 2^13690931 is an apocalyptic number.

13690931 is a deficient number, since it is larger than the sum of its proper divisors (187621).

13690931 is an equidigital number, since it uses as much as digits as its factorization.

13690931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187620.

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 13690931 is about 3700.1258086719. The cubic root of 13690931 is about 239.2274405700.

The spelling of 13690931 in words is "thirteen million, six hundred ninety thousand, nine hundred thirty-one".