879516809 has 2 divisors, whose sum is σ = 879516810. Its totient is φ = 879516808.

The previous prime is 879516769. The next prime is 879516823. The reversal of 879516809 is 908615978.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 875982409 + 3534400 = 29597^2 + 1880^2 .

It is a cyclic number.

It is not a de Polignac number, because 879516809 - 2¹⁶ = 879451273 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (879516889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439758404 + 439758405.

It is an arithmetic number, because the mean of its divisors is an integer number (439758405).

Almost surely, 2^879516809 is an apocalyptic number.

It is an amenable number.

879516809 is a deficient number, since it is larger than the sum of its proper divisors (1).

879516809 is an equidigital number, since it uses as much as digits as its factorization.

879516809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 53.

The square root of 879516809 is about 29656.6486474787. The cubic root of 879516809 is about 958.1085475626.

The spelling of 879516809 in words is "eight hundred seventy-nine million, five hundred sixteen thousand, eight hundred nine".