68147343217 has 2 divisors, whose sum is σ = 68147343218. Its totient is φ = 68147343216.

The previous prime is 68147343211. The next prime is 68147343247. The reversal of 68147343217 is 71234374186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66383007201 + 1764336016 = 257649^2 + 42004^2 .

It is a cyclic number.

It is not a de Polignac number, because 68147343217 - 2¹⁵ = 68147310449 is a prime.

It is not a weakly prime, because it can be changed into another prime (68147343211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34073671608 + 34073671609.

It is an arithmetic number, because the mean of its divisors is an integer number (34073671609).

Almost surely, 2^68147343217 is an apocalyptic number.

It is an amenable number.

68147343217 is a deficient number, since it is larger than the sum of its proper divisors (1).

68147343217 is an equidigital number, since it uses as much as digits as its factorization.

68147343217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 46.

The spelling of 68147343217 in words is "sixty-eight billion, one hundred forty-seven million, three hundred forty-three thousand, two hundred seventeen".