68396728319 has 2 divisors, whose sum is σ = 68396728320. Its totient is φ = 68396728318.

The previous prime is 68396728313. The next prime is 68396728321. The reversal of 68396728319 is 91382769386.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68396728319 is a prime.

It is a super-2 number, since 2×68396728319² (a number of 22 digits) contains 22 as substring.

Together with 68396728321, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68396728313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34198364159 + 34198364160.

It is an arithmetic number, because the mean of its divisors is an integer number (34198364160).

Almost surely, 2^68396728319 is an apocalyptic number.

68396728319 is a deficient number, since it is larger than the sum of its proper divisors (1).

68396728319 is an equidigital number, since it uses as much as digits as its factorization.

68396728319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23514624, while the sum is 62.

The spelling of 68396728319 in words is "sixty-eight billion, three hundred ninety-six million, seven hundred twenty-eight thousand, three hundred nineteen".