13538923 has 2 divisors, whose sum is σ = 13538924. Its totient is φ = 13538922.

The previous prime is 13538879. The next prime is 13538933. The reversal of 13538923 is 32983531.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13538923 is a prime.

It is not a weakly prime, because it can be changed into another prime (13538933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6769461 + 6769462.

It is an arithmetic number, because the mean of its divisors is an integer number (6769462).

Almost surely, 2^13538923 is an apocalyptic number.

13538923 is a deficient number, since it is larger than the sum of its proper divisors (1).

13538923 is an equidigital number, since it uses as much as digits as its factorization.

13538923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 34.

The square root of 13538923 is about 3679.5275511946. The cubic root of 13538923 is about 238.3387767786.

The spelling of 13538923 in words is "thirteen million, five hundred thirty-eight thousand, nine hundred twenty-three".