198683091 has 16 divisors (see below), whose sum is σ = 301192320. Its totient is φ = 129374280.

The previous prime is 198683083. The next prime is 198683113. The reversal of 198683091 is 190386891.

It is not a de Polignac number, because 198683091 - 2³ = 198683083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198683071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84405 + ... + 86726.

It is an arithmetic number, because the mean of its divisors is an integer number (18824520).

Almost surely, 2^198683091 is an apocalyptic number.

198683091 is a deficient number, since it is larger than the sum of its proper divisors (102509229).

198683091 is a wasteful number, since it uses less digits than its factorization.

198683091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171183 (or 171177 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 198683091 is about 14095.4989624348. The cubic root of 198683091 is about 583.5171649909.

The spelling of 198683091 in words is "one hundred ninety-eight million, six hundred eighty-three thousand, ninety-one".