679111387439 has 2 divisors, whose sum is σ = 679111387440. Its totient is φ = 679111387438.

The previous prime is 679111387433. The next prime is 679111387517. The reversal of 679111387439 is 934783111976.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 679111387439 - 2⁸ = 679111387183 is a prime.

It is a super-2 number, since 2×679111387439² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (679111387433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339555693719 + 339555693720.

It is an arithmetic number, because the mean of its divisors is an integer number (339555693720).

Almost surely, 2^679111387439 is an apocalyptic number.

679111387439 is a deficient number, since it is larger than the sum of its proper divisors (1).

679111387439 is an equidigital number, since it uses as much as digits as its factorization.

679111387439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6858432, while the sum is 59.

The spelling of 679111387439 in words is "six hundred seventy-nine billion, one hundred eleven million, three hundred eighty-seven thousand, four hundred thirty-nine".