879370721 has 2 divisors, whose sum is σ = 879370722. Its totient is φ = 879370720.

The previous prime is 879370699. The next prime is 879370729. The reversal of 879370721 is 127073978.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 766182400 + 113188321 = 27680^2 + 10639^2 .

It is a cyclic number.

It is not a de Polignac number, because 879370721 - 2¹⁴ = 879354337 is a prime.

It is a super-3 number, since 3×879370721³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (879370729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439685360 + 439685361.

It is an arithmetic number, because the mean of its divisors is an integer number (439685361).

Almost surely, 2^879370721 is an apocalyptic number.

It is an amenable number.

879370721 is a deficient number, since it is larger than the sum of its proper divisors (1).

879370721 is an equidigital number, since it uses as much as digits as its factorization.

879370721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 148176, while the sum is 44.

The square root of 879370721 is about 29654.1855561740. The cubic root of 879370721 is about 958.0554972549.

The spelling of 879370721 in words is "eight hundred seventy-nine million, three hundred seventy thousand, seven hundred twenty-one".