13806931 has 2 divisors, whose sum is σ = 13806932. Its totient is φ = 13806930.

The previous prime is 13806917. The next prime is 13806943. The reversal of 13806931 is 13960831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13806931 - 2⁵ = 13806899 is a prime.

It is a super-2 number, since 2×13806931² = 381262687277522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13806893 and 13806902.

It is not a weakly prime, because it can be changed into another prime (13806971) 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 as a sum of consecutive naturals, namely, 6903465 + 6903466.

It is an arithmetic number, because the mean of its divisors is an integer number (6903466).

Almost surely, 2^13806931 is an apocalyptic number.

13806931 is a deficient number, since it is larger than the sum of its proper divisors (1).

13806931 is an equidigital number, since it uses as much as digits as its factorization.

13806931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 13806931 is about 3715.7678883375. The cubic root of 13806931 is about 239.9011803816.

The spelling of 13806931 in words is "thirteen million, eight hundred six thousand, nine hundred thirty-one".