879869009 has 2 divisors, whose sum is σ = 879869010. Its totient is φ = 879869008.

The previous prime is 879868993. The next prime is 879869033. The reversal of 879869009 is 900968978.

879869009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 687907984 + 191961025 = 26228^2 + 13855^2 .

It is a cyclic number.

It is not a de Polignac number, because 879869009 - 2⁴ = 879868993 is a prime.

It is not a weakly prime, because it can be changed into another prime (879869609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439934504 + 439934505.

It is an arithmetic number, because the mean of its divisors is an integer number (439934505).

Almost surely, 2^879869009 is an apocalyptic number.

It is an amenable number.

879869009 is a deficient number, since it is larger than the sum of its proper divisors (1).

879869009 is an equidigital number, since it uses as much as digits as its factorization.

879869009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 56.

The square root of 879869009 is about 29662.5860133603. The cubic root of 879869009 is about 958.2364211078.

The spelling of 879869009 in words is "eight hundred seventy-nine million, eight hundred sixty-nine thousand, nine".