39386993 has 2 divisors, whose sum is σ = 39386994. Its totient is φ = 39386992.

The previous prime is 39386983. The next prime is 39387013. The reversal of 39386993 is 39968393.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21603904 + 17783089 = 4648^2 + 4217^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39386993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39386923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19693496 + 19693497.

It is an arithmetic number, because the mean of its divisors is an integer number (19693497).

Almost surely, 2^39386993 is an apocalyptic number.

It is an amenable number.

39386993 is a deficient number, since it is larger than the sum of its proper divisors (1).

39386993 is an equidigital number, since it uses as much as digits as its factorization.

39386993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 944784, while the sum is 50.

The square root of 39386993 is about 6275.9057513637. The cubic root of 39386993 is about 340.2391425991.

The spelling of 39386993 in words is "thirty-nine million, three hundred eighty-six thousand, nine hundred ninety-three".