13689931 has 2 divisors, whose sum is σ = 13689932. Its totient is φ = 13689930.

The previous prime is 13689911. The next prime is 13689959. The reversal of 13689931 is 13998631.

It is a weak prime.

It is an emirp because it is prime and its reverse (13998631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13689931 - 2¹³ = 13681739 is a prime.

It is a super-2 number, since 2×13689931² = 374828421569522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13689911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6844965 + 6844966.

It is an arithmetic number, because the mean of its divisors is an integer number (6844966).

Almost surely, 2^13689931 is an apocalyptic number.

13689931 is a deficient number, since it is larger than the sum of its proper divisors (1).

13689931 is an equidigital number, since it uses as much as digits as its factorization.

13689931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 40.

The square root of 13689931 is about 3699.9906756639. The cubic root of 13689931 is about 239.2216159535.

The spelling of 13689931 in words is "thirteen million, six hundred eighty-nine thousand, nine hundred thirty-one".