879360509 has 2 divisors, whose sum is σ = 879360510. Its totient is φ = 879360508.

The previous prime is 879360499. The next prime is 879360511. The reversal of 879360509 is 905063978.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 871548484 + 7812025 = 29522^2 + 2795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-879360509 is a prime.

Together with 879360511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (879360529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439680254 + 439680255.

It is an arithmetic number, because the mean of its divisors is an integer number (439680255).

Almost surely, 2^879360509 is an apocalyptic number.

It is an amenable number.

879360509 is a deficient number, since it is larger than the sum of its proper divisors (1).

879360509 is an equidigital number, since it uses as much as digits as its factorization.

879360509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 879360509 is about 29654.0133708744. The cubic root of 879360509 is about 958.0517886558.

The spelling of 879360509 in words is "eight hundred seventy-nine million, three hundred sixty thousand, five hundred nine".