679239939293 has 2 divisors, whose sum is σ = 679239939294. Its totient is φ = 679239939292.

The previous prime is 679239939281. The next prime is 679239939331. The reversal of 679239939293 is 392939932976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 544211617849 + 135028321444 = 737707^2 + 367462^2 .

It is a cyclic number.

It is not a de Polignac number, because 679239939293 - 2¹⁴ = 679239922909 is a prime.

It is a super-2 number, since 2×679239939293² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (679239939493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339619969646 + 339619969647.

It is an arithmetic number, because the mean of its divisors is an integer number (339619969647).

Almost surely, 2^679239939293 is an apocalyptic number.

It is an amenable number.

679239939293 is a deficient number, since it is larger than the sum of its proper divisors (1).

679239939293 is an equidigital number, since it uses as much as digits as its factorization.

679239939293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 267846264, while the sum is 71.

The spelling of 679239939293 in words is "six hundred seventy-nine billion, two hundred thirty-nine million, nine hundred thirty-nine thousand, two hundred ninety-three".