679842408899 has 2 divisors, whose sum is σ = 679842408900. Its totient is φ = 679842408898.

The previous prime is 679842408881. The next prime is 679842408979. The reversal of 679842408899 is 998804248976.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-679842408899 is a prime.

It is a super-2 number, since 2×679842408899² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (679842408829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339921204449 + 339921204450.

It is an arithmetic number, because the mean of its divisors is an integer number (339921204450).

Almost surely, 2^679842408899 is an apocalyptic number.

679842408899 is a deficient number, since it is larger than the sum of its proper divisors (1).

679842408899 is an equidigital number, since it uses as much as digits as its factorization.

679842408899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 501645312, while the sum is 74.

The spelling of 679842408899 in words is "six hundred seventy-nine billion, eight hundred forty-two million, four hundred eight thousand, eight hundred ninety-nine".