39855899 has 4 divisors (see below), whose sum is σ = 39890664. Its totient is φ = 39821136.

The previous prime is 39855869. The next prime is 39855917. The reversal of 39855899 is 99855893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99855893 = 1471 ⋅67883.

It is a cyclic number.

It is not a de Polignac number, because 39855899 - 2⁸ = 39855643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39855839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15602 + ... + 17975.

It is an arithmetic number, because the mean of its divisors is an integer number (9972666).

Almost surely, 2^39855899 is an apocalyptic number.

39855899 is a deficient number, since it is larger than the sum of its proper divisors (34765).

39855899 is a wasteful number, since it uses less digits than its factorization.

39855899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34764.

The product of its digits is 3499200, while the sum is 56.

The square root of 39855899 is about 6313.1528573289. The cubic root of 39855899 is about 341.5840131086.

The spelling of 39855899 in words is "thirty-nine million, eight hundred fifty-five thousand, eight hundred ninety-nine".