679862268989 has 2 divisors, whose sum is σ = 679862268990. Its totient is φ = 679862268988.

The previous prime is 679862268971. The next prime is 679862268997. The reversal of 679862268989 is 989862268976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 664151652025 + 15710616964 = 814955^2 + 125342^2 .

It is a cyclic number.

It is not a de Polignac number, because 679862268989 - 2⁸ = 679862268733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (679862268089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339931134494 + 339931134495.

It is an arithmetic number, because the mean of its divisors is an integer number (339931134495).

Almost surely, 2^679862268989 is an apocalyptic number.

It is an amenable number.

679862268989 is a deficient number, since it is larger than the sum of its proper divisors (1).

679862268989 is an equidigital number, since it uses as much as digits as its factorization.

679862268989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2257403904, while the sum is 80.

The spelling of 679862268989 in words is "six hundred seventy-nine billion, eight hundred sixty-two million, two hundred sixty-eight thousand, nine hundred eighty-nine".