879209 has 4 divisors (see below), whose sum is σ = 882816. Its totient is φ = 875604.

The previous prime is 879199. The next prime is 879227. The reversal of 879209 is 902978.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 879209 - 2⁸ = 878953 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 879209.

It is not an unprimeable number, because it can be changed into a prime (879239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1409 + ... + 1934.

It is an arithmetic number, because the mean of its divisors is an integer number (220704).

2⁸⁷⁹²⁰⁹ is an apocalyptic number.

It is an amenable number.

879209 is a deficient number, since it is larger than the sum of its proper divisors (3607).

879209 is a wasteful number, since it uses less digits than its factorization.

879209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3606.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 879209 is about 937.6614527643. The cubic root of 879209 is about 95.7996763137.

The spelling of 879209 in words is "eight hundred seventy-nine thousand, two hundred nine".