879684506609 has 2 divisors, whose sum is σ = 879684506610. Its totient is φ = 879684506608.

The previous prime is 879684506573. The next prime is 879684506627. The reversal of 879684506609 is 906605486978.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 633894630625 + 245789875984 = 796175^2 + 495772^2 .

It is a cyclic number.

It is not a de Polignac number, because 879684506609 - 2²⁸ = 879416071153 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (879684506689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439842253304 + 439842253305.

It is an arithmetic number, because the mean of its divisors is an integer number (439842253305).

Almost surely, 2^879684506609 is an apocalyptic number.

It is an amenable number.

879684506609 is a deficient number, since it is larger than the sum of its proper divisors (1).

879684506609 is an equidigital number, since it uses as much as digits as its factorization.

879684506609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 156764160, while the sum is 68.

The spelling of 879684506609 in words is "eight hundred seventy-nine billion, six hundred eighty-four million, five hundred six thousand, six hundred nine".