198668099 has 6 divisors (see below), whose sum is σ = 231103764. Its totient is φ = 170286900.

The previous prime is 198668081. The next prime is 198668131. The reversal of 198668099 is 990866891.

It is not a de Polignac number, because 198668099 - 2¹² = 198664003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198668999) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2027177 + ... + 2027274.

It is an arithmetic number, because the mean of its divisors is an integer number (38517294).

Almost surely, 2^198668099 is an apocalyptic number.

198668099 is a deficient number, since it is larger than the sum of its proper divisors (32435665).

198668099 is an equidigital number, since it uses as much as digits as its factorization.

198668099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4054465 (or 4054458 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 56.

The square root of 198668099 is about 14094.9671514339. The cubic root of 198668099 is about 583.5024878329.

The spelling of 198668099 in words is "one hundred ninety-eight million, six hundred sixty-eight thousand, ninety-nine".