198197794 has 4 divisors (see below), whose sum is σ = 297296694. Its totient is φ = 99098896.

The previous prime is 198197711. The next prime is 198197801. The reversal of 198197794 is 497791891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 497791891 = 73 ⋅6819067.

It can be written as a sum of positive squares in only one way, i.e., 115842169 + 82355625 = 10763^2 + 9075^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49549447 + ... + 49549450.

Almost surely, 2^198197794 is an apocalyptic number.

198197794 is a deficient number, since it is larger than the sum of its proper divisors (99098900).

198197794 is an equidigital number, since it uses as much as digits as its factorization.

198197794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99098899.

The product of its digits is 1143072, while the sum is 55.

The square root of 198197794 is about 14078.2738288471. The cubic root of 198197794 is about 583.0416841586.

The spelling of 198197794 in words is "one hundred ninety-eight million, one hundred ninety-seven thousand, seven hundred ninety-four".