879265021 has 2 divisors, whose sum is σ = 879265022. Its totient is φ = 879265020.

The previous prime is 879264979. The next prime is 879265039. The reversal of 879265021 is 120562978.

879265021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 807184921 + 72080100 = 28411^2 + 8490^2 .

It is a cyclic number.

It is not a de Polignac number, because 879265021 - 2²¹ = 877167869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (879265921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439632510 + 439632511.

It is an arithmetic number, because the mean of its divisors is an integer number (439632511).

Almost surely, 2^879265021 is an apocalyptic number.

It is an amenable number.

879265021 is a deficient number, since it is larger than the sum of its proper divisors (1).

879265021 is an equidigital number, since it uses as much as digits as its factorization.

879265021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 879265021 is about 29652.4032921448. The cubic root of 879265021 is about 958.0171097576.

The spelling of 879265021 in words is "eight hundred seventy-nine million, two hundred sixty-five thousand, twenty-one".