198893009 has 16 divisors (see below), whose sum is σ = 237619200. Its totient is φ = 166309920.

The previous prime is 198892999. The next prime is 198893011. The reversal of 198893009 is 900398891.

It is a de Polignac number, because none of the positive numbers 2^k-198893009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198893039) 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, 6992 + ... + 21134.

It is an arithmetic number, because the mean of its divisors is an integer number (14851200).

Almost surely, 2^198893009 is an apocalyptic number.

It is an amenable number.

198893009 is a deficient number, since it is larger than the sum of its proper divisors (38726191).

198893009 is an equidigital number, since it uses as much as digits as its factorization.

198893009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14205 (or 14191 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 198893009 is about 14102.9432743665. The cubic root of 198893009 is about 583.7225970718.

The spelling of 198893009 in words is "one hundred ninety-eight million, eight hundred ninety-three thousand, nine".