39868399 has 2 divisors, whose sum is σ = 39868400. Its totient is φ = 39868398.

The previous prime is 39868393. The next prime is 39868421. The reversal of 39868399 is 99386893.

It is a weak prime.

It is an emirp because it is prime and its reverse (99386893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39868399 - 2⁹ = 39867887 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39868393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19934199 + 19934200.

It is an arithmetic number, because the mean of its divisors is an integer number (19934200).

Almost surely, 2^39868399 is an apocalyptic number.

39868399 is a deficient number, since it is larger than the sum of its proper divisors (1).

39868399 is an equidigital number, since it uses as much as digits as its factorization.

39868399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2519424, while the sum is 55.

The square root of 39868399 is about 6314.1427763395. The cubic root of 39868399 is about 341.6197196914.

The spelling of 39868399 in words is "thirty-nine million, eight hundred sixty-eight thousand, three hundred ninety-nine".