199903025 has 24 divisors (see below), whose sum is σ = 284279424. Its totient is φ = 136598400.

The previous prime is 199903021. The next prime is 199903043. The reversal of 199903025 is 520309991.

It is not a de Polignac number, because 199903025 - 2² = 199903021 is a prime.

It is a super-2 number, since 2×199903025² = 79922438808301250, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 199903025.

It is not an unprimeable number, because it can be changed into a prime (199903021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52589 + ... + 56261.

It is an arithmetic number, because the mean of its divisors is an integer number (11844976).

Almost surely, 2^199903025 is an apocalyptic number.

It is an amenable number.

199903025 is a deficient number, since it is larger than the sum of its proper divisors (84376399).

199903025 is a wasteful number, since it uses less digits than its factorization.

199903025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4001 (or 3996 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 38.

The square root of 199903025 is about 14138.7066240162. The cubic root of 199903025 is about 584.7090134885.

The spelling of 199903025 in words is "one hundred ninety-nine million, nine hundred three thousand, twenty-five".