13923431 has 2 divisors, whose sum is σ = 13923432. Its totient is φ = 13923430.

The previous prime is 13923407. The next prime is 13923439. The reversal of 13923431 is 13432931.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13923431 - 2²² = 9729127 is a prime.

It is a super-2 number, since 2×13923431² = 387723861623522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13923431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13923439) 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, 6961715 + 6961716.

It is an arithmetic number, because the mean of its divisors is an integer number (6961716).

Almost surely, 2^13923431 is an apocalyptic number.

13923431 is a deficient number, since it is larger than the sum of its proper divisors (1).

13923431 is an equidigital number, since it uses as much as digits as its factorization.

13923431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 26.

The square root of 13923431 is about 3731.4113951694. The cubic root of 13923431 is about 240.5740367923.

The spelling of 13923431 in words is "thirteen million, nine hundred twenty-three thousand, four hundred thirty-one".