199908925 has 12 divisors (see below), whose sum is σ = 255884416. Its totient is φ = 154767600.

The previous prime is 199908923. The next prime is 199908941. The reversal of 199908925 is 529809991.

It is not a de Polignac number, because 199908925 - 2¹ = 199908923 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199908923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128199 + ... + 129748.

Almost surely, 2^199908925 is an apocalyptic number.

It is an amenable number.

199908925 is a deficient number, since it is larger than the sum of its proper divisors (55975491).

199908925 is a wasteful number, since it uses less digits than its factorization.

199908925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257988 (or 257983 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 52.

The square root of 199908925 is about 14138.9152695672. The cubic root of 199908925 is about 584.7147658597.

The spelling of 199908925 in words is "one hundred ninety-nine million, nine hundred eight thousand, nine hundred twenty-five".