39312221393 has 2 divisors, whose sum is σ = 39312221394. Its totient is φ = 39312221392.

The previous prime is 39312221321. The next prime is 39312221411.

39312221393 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27069462784 + 12242758609 = 164528^2 + 110647^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 39312221393 - 2¹⁸ = 39311959249 is a prime.

It is not a weakly prime, because it can be changed into another prime (39312221303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19656110696 + 19656110697.

It is an arithmetic number, because the mean of its divisors is an integer number (19656110697).

Almost surely, 2^39312221393 is an apocalyptic number.

It is an amenable number.

39312221393 is a deficient number, since it is larger than the sum of its proper divisors (1).

39312221393 is an equidigital number, since it uses as much as digits as its factorization.

39312221393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52488, while the sum is 38.

The spelling of 39312221393 in words is "thirty-nine billion, three hundred twelve million, two hundred twenty-one thousand, three hundred ninety-three".