13979923 has 2 divisors, whose sum is σ = 13979924. Its totient is φ = 13979922.

The previous prime is 13979921. The next prime is 13979941. The reversal of 13979923 is 32997931.

It is a weak prime.

It is an emirp because it is prime and its reverse (32997931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13979923 - 2¹ = 13979921 is a prime.

Together with 13979921, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 13979923.

It is not a weakly prime, because it can be changed into another prime (13979921) 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, 6989961 + 6989962.

It is an arithmetic number, because the mean of its divisors is an integer number (6989962).

Almost surely, 2^13979923 is an apocalyptic number.

13979923 is a deficient number, since it is larger than the sum of its proper divisors (1).

13979923 is an equidigital number, since it uses as much as digits as its factorization.

13979923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 91854, while the sum is 43.

The square root of 13979923 is about 3738.9735222384. The cubic root of 13979923 is about 240.8989607616.

The spelling of 13979923 in words is "thirteen million, nine hundred seventy-nine thousand, nine hundred twenty-three".