13231579 has 4 divisors (see below), whose sum is σ = 13243176. Its totient is φ = 13219984.

The previous prime is 13231553. The next prime is 13231583. The reversal of 13231579 is 97513231.

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 13231579 - 2⁹ = 13231067 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13231579.

It is not an unprimeable number, because it can be changed into a prime (13231529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3874 + ... + 6439.

It is an arithmetic number, because the mean of its divisors is an integer number (3310794).

Almost surely, 2^13231579 is an apocalyptic number.

13231579 is a deficient number, since it is larger than the sum of its proper divisors (11597).

13231579 is a wasteful number, since it uses less digits than its factorization.

13231579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11596.

The product of its digits is 5670, while the sum is 31.

The square root of 13231579 is about 3637.5237456270. The cubic root of 13231579 is about 236.5214637538.

The spelling of 13231579 in words is "thirteen million, two hundred thirty-one thousand, five hundred seventy-nine".