39899 has 4 divisors (see below), whose sum is σ = 42264. Its totient is φ = 37536.

The previous prime is 39887. The next prime is 39901. The reversal of 39899 is 99893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99893 = 191 ⋅523.

It is not a de Polignac number, because 39899 - 2⁴ = 39883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39829) 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, 1157 + ... + 1190.

It is an arithmetic number, because the mean of its divisors is an integer number (10566).

2³⁹⁸⁹⁹ is an apocalyptic number.

39899 is a deficient number, since it is larger than the sum of its proper divisors (2365).

39899 is a wasteful number, since it uses less digits than its factorization.

39899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2364.

The product of its digits is 17496, while the sum is 38.

The square root of 39899 is about 199.7473404078. The cubic root of 39899 is about 34.1707100774.

The spelling of 39899 in words is "thirty-nine thousand, eight hundred ninety-nine".