13401931 has 2 divisors, whose sum is σ = 13401932. Its totient is φ = 13401930.

The previous prime is 13401919. The next prime is 13401937. The reversal of 13401931 is 13910431.

It is a strong prime.

It is an emirp because it is prime and its reverse (13910431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13401931 - 2⁷ = 13401803 is a prime.

It is a super-2 number, since 2×13401931² = 359223509057522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13401937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6700965 + 6700966.

It is an arithmetic number, because the mean of its divisors is an integer number (6700966).

Almost surely, 2^13401931 is an apocalyptic number.

13401931 is a deficient number, since it is larger than the sum of its proper divisors (1).

13401931 is an equidigital number, since it uses as much as digits as its factorization.

13401931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 13401931 is about 3660.8647885438. The cubic root of 13401931 is about 237.5321825272.

The spelling of 13401931 in words is "thirteen million, four hundred one thousand, nine hundred thirty-one".