199893939 has 32 divisors (see below), whose sum is σ = 323896320. Its totient is φ = 107046912.

The previous prime is 199893931. The next prime is 199893959. The reversal of 199893939 is 939398991.

It is not a de Polignac number, because 199893939 - 2³ = 199893931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199893931) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92827 + ... + 94955.

It is an arithmetic number, because the mean of its divisors is an integer number (10121760).

Almost surely, 2^199893939 is an apocalyptic number.

199893939 is a deficient number, since it is larger than the sum of its proper divisors (124002381).

199893939 is a wasteful number, since it uses less digits than its factorization.

199893939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2419.

The product of its digits is 4251528, while the sum is 60.

The square root of 199893939 is about 14138.3853038457. The cubic root of 199893939 is about 584.7001546154.

The spelling of 199893939 in words is "one hundred ninety-nine million, eight hundred ninety-three thousand, nine hundred thirty-nine".