13965431 has 2 divisors, whose sum is σ = 13965432. Its totient is φ = 13965430.

The previous prime is 13965403. The next prime is 13965473. The reversal of 13965431 is 13456931.

It is a weak prime.

It is an emirp because it is prime and its reverse (13456931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13965431 - 2¹⁰ = 13964407 is a prime.

It is a super-2 number, since 2×13965431² = 390066526031522, 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 (13965491) 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, 6982715 + 6982716.

It is an arithmetic number, because the mean of its divisors is an integer number (6982716).

Almost surely, 2^13965431 is an apocalyptic number.

13965431 is a deficient number, since it is larger than the sum of its proper divisors (1).

13965431 is an equidigital number, since it uses as much as digits as its factorization.

13965431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 32.

The square root of 13965431 is about 3737.0350546924. The cubic root of 13965431 is about 240.8156909953.

It can be divided in two parts, 139 and 65431, that multiplied together give a palindrome (9094909).

The spelling of 13965431 in words is "thirteen million, nine hundred sixty-five thousand, four hundred thirty-one".