199939072 has 22 divisors (see below), whose sum is σ = 399684938. Its totient is φ = 99969024.

The previous prime is 199939063. The next prime is 199939073. The reversal of 199939072 is 270939991.

It can be written as a sum of positive squares in only one way, i.e., 158155776 + 41783296 = 12576^2 + 6464^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199939073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96603 + ... + 98650.

Almost surely, 2^199939072 is an apocalyptic number.

It is an amenable number.

199939072 is a deficient number, since it is larger than the sum of its proper divisors (199745866).

199939072 is an equidigital number, since it uses as much as digits as its factorization.

199939072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195273 (or 195255 counting only the distinct ones).

The product of its (nonzero) digits is 275562, while the sum is 49.

The square root of 199939072 is about 14139.9813295492. The cubic root of 199939072 is about 584.7441567603.

The spelling of 199939072 in words is "one hundred ninety-nine million, nine hundred thirty-nine thousand, seventy-two".