15139623 has 8 divisors (see below), whose sum is σ = 20731888. Its totient is φ = 9820224.

The previous prime is 15139601. The next prime is 15139669. The reversal of 15139623 is 32693151.

15139623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 15139623 - 2⁵ = 15139591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15139723) 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, 68086 + ... + 68307.

It is an arithmetic number, because the mean of its divisors is an integer number (2591486).

Almost surely, 2^15139623 is an apocalyptic number.

15139623 is a deficient number, since it is larger than the sum of its proper divisors (5592265).

15139623 is a wasteful number, since it uses less digits than its factorization.

15139623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136433.

The product of its digits is 4860, while the sum is 30.

The square root of 15139623 is about 3890.9668464278. The cubic root of 15139623 is about 247.3840452649.

The spelling of 15139623 in words is "fifteen million, one hundred thirty-nine thousand, six hundred twenty-three".