198492681 has 8 divisors (see below), whose sum is σ = 264872160. Its totient is φ = 132220832.

The previous prime is 198492673. The next prime is 198492683. The reversal of 198492681 is 186294891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198492681 - 2³ = 198492673 is a prime.

It is a super-2 number, since 2×198492681² = 78798688821135522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 198492681.

It is not an unprimeable number, because it can be changed into a prime (198492683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22500 + ... + 30053.

It is an arithmetic number, because the mean of its divisors is an integer number (33109020).

Almost surely, 2^198492681 is an apocalyptic number.

It is an amenable number.

198492681 is a deficient number, since it is larger than the sum of its proper divisors (66379479).

198492681 is a wasteful number, since it uses less digits than its factorization.

198492681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53815.

The product of its digits is 248832, while the sum is 48.

The square root of 198492681 is about 14088.7430596203. The cubic root of 198492681 is about 583.3306988362.

The spelling of 198492681 in words is "one hundred ninety-eight million, four hundred ninety-two thousand, six hundred eighty-one".