879221 has 16 divisors (see below), whose sum is σ = 1081344. Its totient is φ = 698544.

The previous prime is 879199. The next prime is 879227. The reversal of 879221 is 122978.

It is a happy number.

It is not a de Polignac number, because 879221 - 2¹⁰ = 878197 is a prime.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (879227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6860 + ... + 6986.

It is an arithmetic number, because the mean of its divisors is an integer number (67584).

2⁸⁷⁹²²¹ is an apocalyptic number.

It is an amenable number.

879221 is a deficient number, since it is larger than the sum of its proper divisors (202123).

879221 is a wasteful number, since it uses less digits than its factorization.

879221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200.

The product of its digits is 2016, while the sum is 29.

The square root of 879221 is about 937.6678516404. The cubic root of 879221 is about 95.8001121565.

The spelling of 879221 in words is "eight hundred seventy-nine thousand, two hundred twenty-one".