68391823979 has 2 divisors, whose sum is σ = 68391823980. Its totient is φ = 68391823978.

The previous prime is 68391823931. The next prime is 68391823993. The reversal of 68391823979 is 97932819386.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68391823979 - 2²⁸ = 68123388523 is a prime.

It is not a weakly prime, because it can be changed into another prime (68391823909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34195911989 + 34195911990.

It is an arithmetic number, because the mean of its divisors is an integer number (34195911990).

Almost surely, 2^68391823979 is an apocalyptic number.

68391823979 is a deficient number, since it is larger than the sum of its proper divisors (1).

68391823979 is an equidigital number, since it uses as much as digits as its factorization.

68391823979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35271936, while the sum is 65.

The spelling of 68391823979 in words is "sixty-eight billion, three hundred ninety-one million, eight hundred twenty-three thousand, nine hundred seventy-nine".