13668931 has 2 divisors, whose sum is σ = 13668932. Its totient is φ = 13668930.

The previous prime is 13668917. The next prime is 13668937. The reversal of 13668931 is 13986631.

13668931 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13668931 - 2⁹ = 13668419 is a prime.

It is a super-2 number, since 2×13668931² = 373679349365522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13668937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6834465 + 6834466.

It is an arithmetic number, because the mean of its divisors is an integer number (6834466).

Almost surely, 2^13668931 is an apocalyptic number.

13668931 is a deficient number, since it is larger than the sum of its proper divisors (1).

13668931 is an equidigital number, since it uses as much as digits as its factorization.

13668931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 37.

The square root of 13668931 is about 3697.1517415438. The cubic root of 13668931 is about 239.0992334315.

The spelling of 13668931 in words is "thirteen million, six hundred sixty-eight thousand, nine hundred thirty-one".