879652139 has 4 divisors (see below), whose sum is σ = 925949640. Its totient is φ = 833354640.

The previous prime is 879652129. The next prime is 879652159. The reversal of 879652139 is 931256978.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-879652139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (879652129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23148722 + ... + 23148759.

It is an arithmetic number, because the mean of its divisors is an integer number (231487410).

Almost surely, 2^879652139 is an apocalyptic number.

879652139 is a deficient number, since it is larger than the sum of its proper divisors (46297501).

879652139 is a wasteful number, since it uses less digits than its factorization.

879652139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46297500.

The product of its digits is 816480, while the sum is 50.

The square root of 879652139 is about 29658.9301728838. The cubic root of 879652139 is about 958.1576859754.

The spelling of 879652139 in words is "eight hundred seventy-nine million, six hundred fifty-two thousand, one hundred thirty-nine".