13111923 has 24 divisors (see below), whose sum is σ = 19707408. Its totient is φ = 7744000.

The previous prime is 13111907. The next prime is 13111927. The reversal of 13111923 is 32911131.

It is not a de Polignac number, because 13111923 - 2⁴ = 13111907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13111923.

It is not an unprimeable number, because it can be changed into a prime (13111927) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14443 + ... + 15323.

It is an arithmetic number, because the mean of its divisors is an integer number (821142).

Almost surely, 2^13111923 is an apocalyptic number.

13111923 is a deficient number, since it is larger than the sum of its proper divisors (6595485).

13111923 is a wasteful number, since it uses less digits than its factorization.

13111923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947 (or 936 counting only the distinct ones).

The product of its digits is 162, while the sum is 21.

The square root of 13111923 is about 3621.0389393101. The cubic root of 13111923 is about 235.8063323050.

The spelling of 13111923 in words is "thirteen million, one hundred eleven thousand, nine hundred twenty-three".