39982351693 has 2 divisors, whose sum is σ = 39982351694. Its totient is φ = 39982351692.

The previous prime is 39982351679. The next prime is 39982351699. The reversal of 39982351693 is 39615328993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31576579204 + 8405772489 = 177698^2 + 91683^2 .

It is a cyclic number.

It is not a de Polignac number, because 39982351693 - 2²⁵ = 39948797261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39982351699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19991175846 + 19991175847.

It is an arithmetic number, because the mean of its divisors is an integer number (19991175847).

Almost surely, 2^39982351693 is an apocalyptic number.

It is an amenable number.

39982351693 is a deficient number, since it is larger than the sum of its proper divisors (1).

39982351693 is an equidigital number, since it uses as much as digits as its factorization.

39982351693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9447840, while the sum is 58.

The spelling of 39982351693 in words is "thirty-nine billion, nine hundred eighty-two million, three hundred fifty-one thousand, six hundred ninety-three".