198505925 has 24 divisors (see below), whose sum is σ = 256653216. Its totient is φ = 152159040.

The previous prime is 198505919. The next prime is 198505949. The reversal of 198505925 is 529505891.

It is not a de Polignac number, because 198505925 - 2⁸ = 198505669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60374 + ... + 63576.

It is an arithmetic number, because the mean of its divisors is an integer number (10693884).

Almost surely, 2^198505925 is an apocalyptic number.

It is an amenable number.

198505925 is a deficient number, since it is larger than the sum of its proper divisors (58147291).

198505925 is a wasteful number, since it uses less digits than its factorization.

198505925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3317 (or 3312 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 44.

The square root of 198505925 is about 14089.2130724182. The cubic root of 198505925 is about 583.3436723791.

The spelling of 198505925 in words is "one hundred ninety-eight million, five hundred five thousand, nine hundred twenty-five".