198030073 has 4 divisors (see below), whose sum is σ = 200255220. Its totient is φ = 195804928.

The previous prime is 198030071. The next prime is 198030083. The reversal of 198030073 is 370030891.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 123587689 + 74442384 = 11117^2 + 8628^2 .

It is a cyclic number.

It is not a de Polignac number, because 198030073 - 2¹ = 198030071 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198030071) 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, 1112440 + ... + 1112617.

It is an arithmetic number, because the mean of its divisors is an integer number (50063805).

Almost surely, 2^198030073 is an apocalyptic number.

It is an amenable number.

198030073 is a deficient number, since it is larger than the sum of its proper divisors (2225147).

198030073 is an equidigital number, since it uses as much as digits as its factorization.

198030073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2225146.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 198030073 is about 14072.3158364215. The cubic root of 198030073 is about 582.8771752117.

The spelling of 198030073 in words is "one hundred ninety-eight million, thirty thousand, seventy-three".