198527997 has 16 divisors (see below), whose sum is σ = 274760640. Its totient is φ = 127354752.

The previous prime is 198527963. The next prime is 198528013. The reversal of 198527997 is 799725891.

It is not a de Polignac number, because 198527997 - 2⁸ = 198527741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198527957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22993 + ... + 30425.

It is an arithmetic number, because the mean of its divisors is an integer number (17172540).

Almost surely, 2^198527997 is an apocalyptic number.

It is an amenable number.

198527997 is a deficient number, since it is larger than the sum of its proper divisors (76232643).

198527997 is a wasteful number, since it uses less digits than its factorization.

198527997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7772.

The product of its digits is 2857680, while the sum is 57.

The square root of 198527997 is about 14089.9963449250. The cubic root of 198527997 is about 583.3652923624.

The spelling of 198527997 in words is "one hundred ninety-eight million, five hundred twenty-seven thousand, nine hundred ninety-seven".