39394441393 has 2 divisors, whose sum is σ = 39394441394. Its totient is φ = 39394441392.

The previous prime is 39394441367. The next prime is 39394441403. The reversal of 39394441393 is 39314449393.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20934327969 + 18460113424 = 144687^2 + 135868^2 .

It is a cyclic number.

It is not a de Polignac number, because 39394441393 - 2⁹ = 39394440881 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39394441393.

It is not a weakly prime, because it can be changed into another prime (39394441363) 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, 19697220696 + 19697220697.

It is an arithmetic number, because the mean of its divisors is an integer number (19697220697).

Almost surely, 2^39394441393 is an apocalyptic number.

It is an amenable number.

39394441393 is a deficient number, since it is larger than the sum of its proper divisors (1).

39394441393 is an equidigital number, since it uses as much as digits as its factorization.

39394441393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3779136, while the sum is 52.

The spelling of 39394441393 in words is "thirty-nine billion, three hundred ninety-four million, four hundred forty-one thousand, three hundred ninety-three".