879139 has 4 divisors (see below), whose sum is σ = 891256. Its totient is φ = 867024.

The previous prime is 879133. The next prime is 879143. The reversal of 879139 is 931978.

879139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931978 = 2 ⋅465989.

It is a cyclic number.

It is not a de Polignac number, because 879139 - 2¹¹ = 877091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 879098 and 879107.

It is not an unprimeable number, because it can be changed into a prime (879133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5949 + ... + 6094.

It is an arithmetic number, because the mean of its divisors is an integer number (222814).

2⁸⁷⁹¹³⁹ is an apocalyptic number.

879139 is a deficient number, since it is larger than the sum of its proper divisors (12117).

879139 is a wasteful number, since it uses less digits than its factorization.

879139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12116.

The product of its digits is 13608, while the sum is 37.

The square root of 879139 is about 937.6241251162. The cubic root of 879139 is about 95.7971338180.

The spelling of 879139 in words is "eight hundred seventy-nine thousand, one hundred thirty-nine".