198120599 has 4 divisors (see below), whose sum is σ = 198971136. Its totient is φ = 197270064.

The previous prime is 198120553. The next prime is 198120623. The reversal of 198120599 is 995021891.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 995021891 = 67 ⋅14851073.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198120599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198120509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424919 + ... + 425384.

It is an arithmetic number, because the mean of its divisors is an integer number (49742784).

Almost surely, 2^198120599 is an apocalyptic number.

198120599 is a deficient number, since it is larger than the sum of its proper divisors (850537).

198120599 is an equidigital number, since it uses as much as digits as its factorization.

198120599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850536.

The product of its (nonzero) digits is 58320, while the sum is 44.

The square root of 198120599 is about 14075.5319260055. The cubic root of 198120599 is about 582.9659790654.

The spelling of 198120599 in words is "one hundred ninety-eight million, one hundred twenty thousand, five hundred ninety-nine".