38939899 has 4 divisors (see below), whose sum is σ = 39578320. Its totient is φ = 38301480.

The previous prime is 38939893. The next prime is 38939909. The reversal of 38939899 is 99893983.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 38939899 - 2⁵ = 38939867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38939893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319119 + ... + 319240.

It is an arithmetic number, because the mean of its divisors is an integer number (9894580).

Almost surely, 2^38939899 is an apocalyptic number.

38939899 is a deficient number, since it is larger than the sum of its proper divisors (638421).

38939899 is an equidigital number, since it uses as much as digits as its factorization.

38939899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638420.

The product of its digits is 3779136, while the sum is 58.

The square root of 38939899 is about 6240.1842120245. The cubic root of 38939899 is about 338.9468537158.

The spelling of 38939899 in words is "thirty-eight million, nine hundred thirty-nine thousand, eight hundred ninety-nine".