39989397713 has 2 divisors, whose sum is σ = 39989397714. Its totient is φ = 39989397712.

The previous prime is 39989397697. The next prime is 39989397727. The reversal of 39989397713 is 31779398993.

39989397713 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39612144784 + 377252929 = 199028^2 + 19423^2 .

It is a cyclic number.

It is not a de Polignac number, because 39989397713 - 2⁴ = 39989397697 is a prime.

It is not a weakly prime, because it can be changed into another prime (39989397743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19994698856 + 19994698857.

It is an arithmetic number, because the mean of its divisors is an integer number (19994698857).

Almost surely, 2^39989397713 is an apocalyptic number.

It is an amenable number.

39989397713 is a deficient number, since it is larger than the sum of its proper divisors (1).

39989397713 is an equidigital number, since it uses as much as digits as its factorization.

39989397713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69441624, while the sum is 68.

The spelling of 39989397713 in words is "thirty-nine billion, nine hundred eighty-nine million, three hundred ninety-seven thousand, seven hundred thirteen".