879721225 has 6 divisors (see below), whose sum is σ = 1090854350. Its totient is φ = 703776960.

The previous prime is 879721163. The next prime is 879721267. The reversal of 879721225 is 522127978.

It can be written as a sum of positive squares in 3 ways, for example, as 314565696 + 565155529 = 17736^2 + 23773^2 .

It is not a de Polignac number, because 879721225 - 2¹¹ = 879719177 is a prime.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 17594400 + ... + 17594449.

Almost surely, 2^879721225 is an apocalyptic number.

It is an amenable number.

879721225 is a deficient number, since it is larger than the sum of its proper divisors (211133125).

879721225 is a wasteful number, since it uses less digits than its factorization.

879721225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35188859 (or 35188854 counting only the distinct ones).

The product of its digits is 141120, while the sum is 43.

The square root of 879721225 is about 29660.0948245281. The cubic root of 879721225 is about 958.1827692047.

The spelling of 879721225 in words is "eight hundred seventy-nine million, seven hundred twenty-one thousand, two hundred twenty-five".