15339979 has 4 divisors (see below), whose sum is σ = 15407784. Its totient is φ = 15272176.

The previous prime is 15339971. The next prime is 15340007. The reversal of 15339979 is 97993351.

15339979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15339979 - 2³ = 15339971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15339971) 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, 33562 + ... + 34015.

It is an arithmetic number, because the mean of its divisors is an integer number (3851946).

Almost surely, 2^15339979 is an apocalyptic number.

15339979 is a deficient number, since it is larger than the sum of its proper divisors (67805).

15339979 is an equidigital number, since it uses as much as digits as its factorization.

15339979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67804.

The product of its digits is 229635, while the sum is 46.

The square root of 15339979 is about 3916.6285246370. The cubic root of 15339979 is about 248.4705502146.

The spelling of 15339979 in words is "fifteen million, three hundred thirty-nine thousand, nine hundred seventy-nine".