879213109 has 4 divisors (see below), whose sum is σ = 879323500. Its totient is φ = 879102720.

The previous prime is 879213079. The next prime is 879213119. The reversal of 879213109 is 901312978.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 901312978 = 2 ⋅450656489.

It can be written as a sum of positive squares in 2 ways, for example, as 444282084 + 434931025 = 21078^2 + 20855^2 .

It is a cyclic number.

It is not a de Polignac number, because 879213109 - 2⁵ = 879213077 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 (879213119) 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, 42234 + ... + 59515.

It is an arithmetic number, because the mean of its divisors is an integer number (219830875).

Almost surely, 2^879213109 is an apocalyptic number.

It is an amenable number.

879213109 is a deficient number, since it is larger than the sum of its proper divisors (110391).

879213109 is a wasteful number, since it uses less digits than its factorization.

879213109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110390.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 879213109 is about 29651.5279370221. The cubic root of 879213109 is about 957.9982555396.

The spelling of 879213109 in words is "eight hundred seventy-nine million, two hundred thirteen thousand, one hundred nine".