879796921 has 2 divisors, whose sum is σ = 879796922. Its totient is φ = 879796920.

The previous prime is 879796847. The next prime is 879796969. The reversal of 879796921 is 129697978.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 654796921 + 225000000 = 25589^2 + 15000^2 .

It is a cyclic number.

It is not a de Polignac number, because 879796921 - 2²³ = 871408313 is a prime.

It is not a weakly prime, because it can be changed into another prime (879793921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439898460 + 439898461.

It is an arithmetic number, because the mean of its divisors is an integer number (439898461).

Almost surely, 2^879796921 is an apocalyptic number.

It is an amenable number.

879796921 is a deficient number, since it is larger than the sum of its proper divisors (1).

879796921 is an equidigital number, since it uses as much as digits as its factorization.

879796921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3429216, while the sum is 58.

The square root of 879796921 is about 29661.3708550364. The cubic root of 879796921 is about 958.2102508359.

The spelling of 879796921 in words is "eight hundred seventy-nine million, seven hundred ninety-six thousand, nine hundred twenty-one".