15309139 has 4 divisors (see below), whose sum is σ = 15331680. Its totient is φ = 15286600.

The previous prime is 15309131. The next prime is 15309167. The reversal of 15309139 is 93190351.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93190351 = 2879 ⋅32369.

It is a cyclic number.

It is not a de Polignac number, because 15309139 - 2³ = 15309131 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 15309139.

It is not an unprimeable number, because it can be changed into a prime (15309131) 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, 10219 + ... + 11620.

It is an arithmetic number, because the mean of its divisors is an integer number (3832920).

Almost surely, 2^15309139 is an apocalyptic number.

15309139 is a deficient number, since it is larger than the sum of its proper divisors (22541).

15309139 is an equidigital number, since it uses as much as digits as its factorization.

15309139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22540.

The product of its (nonzero) digits is 3645, while the sum is 31.

The square root of 15309139 is about 3912.6894842295. The cubic root of 15309139 is about 248.3039273720.

The spelling of 15309139 in words is "fifteen million, three hundred nine thousand, one hundred thirty-nine".