23715139 has 8 divisors (see below), whose sum is σ = 28281600. Its totient is φ = 19443336.

The previous prime is 23715137. The next prime is 23715149. The reversal of 23715139 is 93151732.

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 23715139 - 2¹ = 23715137 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 23715139.

It is not an unprimeable number, because it can be changed into a prime (23715137) 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, 73489 + ... + 73810.

It is an arithmetic number, because the mean of its divisors is an integer number (3535200).

Almost surely, 2^23715139 is an apocalyptic number.

23715139 is a deficient number, since it is larger than the sum of its proper divisors (4566461).

23715139 is a wasteful number, since it uses less digits than its factorization.

23715139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147329.

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

The square root of 23715139 is about 4869.8191958224. The cubic root of 23715139 is about 287.3041448677.

It can be divided in two parts, 237 and 15139, that added together give a square (15376 = 124²).

The spelling of 23715139 in words is "twenty-three million, seven hundred fifteen thousand, one hundred thirty-nine".