879512321 has 2 divisors, whose sum is σ = 879512322. Its totient is φ = 879512320.

The previous prime is 879512317. The next prime is 879512393. The reversal of 879512321 is 123215978.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 716311696 + 163200625 = 26764^2 + 12775^2 .

It is a cyclic number.

It is not a de Polignac number, because 879512321 - 2² = 879512317 is a prime.

It is not a weakly prime, because it can be changed into another prime (879512521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439756160 + 439756161.

It is an arithmetic number, because the mean of its divisors is an integer number (439756161).

Almost surely, 2^879512321 is an apocalyptic number.

It is an amenable number.

879512321 is a deficient number, since it is larger than the sum of its proper divisors (1).

879512321 is an equidigital number, since it uses as much as digits as its factorization.

879512321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 38.

The square root of 879512321 is about 29656.5729813814. The cubic root of 879512321 is about 958.1069178804.

The spelling of 879512321 in words is "eight hundred seventy-nine million, five hundred twelve thousand, three hundred twenty-one".