39638369 has 2 divisors, whose sum is σ = 39638370. Its totient is φ = 39638368.

The previous prime is 39638363. The next prime is 39638381. The reversal of 39638369 is 96383693.

39638369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26388769 + 13249600 = 5137^2 + 3640^2 .

It is a cyclic number.

It is not a de Polignac number, because 39638369 - 2⁴ = 39638353 is a prime.

It is a super-2 number, since 2×39638369² = 3142400593960322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39638363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19819184 + 19819185.

It is an arithmetic number, because the mean of its divisors is an integer number (19819185).

Almost surely, 2^39638369 is an apocalyptic number.

It is an amenable number.

39638369 is a deficient number, since it is larger than the sum of its proper divisors (1).

39638369 is an equidigital number, since it uses as much as digits as its factorization.

39638369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 629856, while the sum is 47.

The square root of 39638369 is about 6295.9009680903. The cubic root of 39638369 is about 340.9614338786.

The spelling of 39638369 in words is "thirty-nine million, six hundred thirty-eight thousand, three hundred sixty-nine".