198690975 has 120 divisors (see below), whose sum is σ = 427794048. Its totient is φ = 89294400.

The previous prime is 198690971. The next prime is 198691007. The reversal of 198690975 is 579096891.

It is not a de Polignac number, because 198690975 - 2² = 198690971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198690971) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1516660 + ... + 1516790.

Almost surely, 2^198690975 is an apocalyptic number.

198690975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

198690975 is an abundant number, since it is smaller than the sum of its proper divisors (229103073).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198690975 is a wasteful number, since it uses less digits than its factorization.

198690975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 54.

The square root of 198690975 is about 14095.7786234035. The cubic root of 198690975 is about 583.5248831255.

The spelling of 198690975 in words is "one hundred ninety-eight million, six hundred ninety thousand, nine hundred seventy-five".