15139913 has 8 divisors (see below), whose sum is σ = 15549600. Its totient is φ = 14732928.

The previous prime is 15139871. The next prime is 15139921. The reversal of 15139913 is 31993151.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15139913 - 2⁶ = 15139849 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 15139913.

It is not an unprimeable number, because it can be changed into a prime (15139963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15833 + ... + 16761.

It is an arithmetic number, because the mean of its divisors is an integer number (1943700).

Almost surely, 2^15139913 is an apocalyptic number.

It is an amenable number.

15139913 is a deficient number, since it is larger than the sum of its proper divisors (409687).

15139913 is an equidigital number, since it uses as much as digits as its factorization.

15139913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351.

The product of its digits is 3645, while the sum is 32.

The square root of 15139913 is about 3891.0041120513. The cubic root of 15139913 is about 247.3856248048.

Subtracting from 15139913 its sum of digits (32), we obtain a square (15139881 = 3891²).

The spelling of 15139913 in words is "fifteen million, one hundred thirty-nine thousand, nine hundred thirteen".