39308111993 has 2 divisors, whose sum is σ = 39308111994. Its totient is φ = 39308111992.

The previous prime is 39308111987. The next prime is 39308112037. The reversal of 39308111993 is 39911180393.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35786045584 + 3522066409 = 189172^2 + 59347^2 .

It is a cyclic number.

It is not a de Polignac number, because 39308111993 - 2⁸ = 39308111737 is a prime.

It is not a weakly prime, because it can be changed into another prime (39308111933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19654055996 + 19654055997.

It is an arithmetic number, because the mean of its divisors is an integer number (19654055997).

Almost surely, 2^39308111993 is an apocalyptic number.

It is an amenable number.

39308111993 is a deficient number, since it is larger than the sum of its proper divisors (1).

39308111993 is an equidigital number, since it uses as much as digits as its factorization.

39308111993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 157464, while the sum is 47.

The spelling of 39308111993 in words is "thirty-nine billion, three hundred eight million, one hundred eleven thousand, nine hundred ninety-three".