39845899 has 2 divisors, whose sum is σ = 39845900. Its totient is φ = 39845898.

The previous prime is 39845887. The next prime is 39845903. The reversal of 39845899 is 99854893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39845899 - 2⁹ = 39845387 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39845849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19922949 + 19922950.

It is an arithmetic number, because the mean of its divisors is an integer number (19922950).

Almost surely, 2^39845899 is an apocalyptic number.

39845899 is a deficient number, since it is larger than the sum of its proper divisors (1).

39845899 is an equidigital number, since it uses as much as digits as its factorization.

39845899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2799360, while the sum is 55.

The square root of 39845899 is about 6312.3608103466. The cubic root of 39845899 is about 341.5554424667. Note that the first 3 decimals are identical.

The spelling of 39845899 in words is "thirty-nine million, eight hundred forty-five thousand, eight hundred ninety-nine".