39968343577 has 2 divisors, whose sum is σ = 39968343578. Its totient is φ = 39968343576.

The previous prime is 39968343511. The next prime is 39968343581. The reversal of 39968343577 is 77534386993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39005855001 + 962488576 = 197499^2 + 31024^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39968343577 is a prime.

It is not a weakly prime, because it can be changed into another prime (39968343277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19984171788 + 19984171789.

It is an arithmetic number, because the mean of its divisors is an integer number (19984171789).

Almost surely, 2^39968343577 is an apocalyptic number.

It is an amenable number.

39968343577 is a deficient number, since it is larger than the sum of its proper divisors (1).

39968343577 is an equidigital number, since it uses as much as digits as its factorization.

39968343577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102876480, while the sum is 64.

The spelling of 39968343577 in words is "thirty-nine billion, nine hundred sixty-eight million, three hundred forty-three thousand, five hundred seventy-seven".