13011923 has 4 divisors (see below), whose sum is σ = 13460640. Its totient is φ = 12563208.

The previous prime is 13011917. The next prime is 13011937. The reversal of 13011923 is 32911031.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13011923 - 2¹⁴ = 12995539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13011895 and 13011904.

It is not an unprimeable number, because it can be changed into a prime (13011223) 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 in 3 ways as a sum of consecutive naturals, for example, 224315 + ... + 224372.

It is an arithmetic number, because the mean of its divisors is an integer number (3365160).

Almost surely, 2^13011923 is an apocalyptic number.

13011923 is a deficient number, since it is larger than the sum of its proper divisors (448717).

13011923 is an equidigital number, since it uses as much as digits as its factorization.

13011923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448716.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 13011923 is about 3607.2043191369. The cubic root of 13011923 is about 235.2053313286.

Adding to 13011923 its reverse (32911031), we get a palindrome (45922954).

The spelling of 13011923 in words is "thirteen million, eleven thousand, nine hundred twenty-three".