13400831 has 2 divisors, whose sum is σ = 13400832. Its totient is φ = 13400830.

The previous prime is 13400801. The next prime is 13400839. The reversal of 13400831 is 13800431.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13400831 - 2⁶ = 13400767 is a prime.

It is a super-2 number, since 2×13400831² = 359164542981122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13400839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6700415 + 6700416.

It is an arithmetic number, because the mean of its divisors is an integer number (6700416).

Almost surely, 2^13400831 is an apocalyptic number.

13400831 is a deficient number, since it is larger than the sum of its proper divisors (1).

13400831 is an equidigital number, since it uses as much as digits as its factorization.

13400831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 13400831 is about 3660.7145477352. The cubic root of 13400831 is about 237.5256836490.

The spelling of 13400831 in words is "thirteen million, four hundred thousand, eight hundred thirty-one".