198749273 has 2 divisors, whose sum is σ = 198749274. Its totient is φ = 198749272.

The previous prime is 198749251. The next prime is 198749303. The reversal of 198749273 is 372947891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109579024 + 89170249 = 10468^2 + 9443^2 .

It is an emirp because it is prime and its reverse (372947891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198749273 - 2²⁰ = 197700697 is a prime.

It is not a weakly prime, because it can be changed into another prime (198740273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99374636 + 99374637.

It is an arithmetic number, because the mean of its divisors is an integer number (99374637).

Almost surely, 2^198749273 is an apocalyptic number.

It is an amenable number.

198749273 is a deficient number, since it is larger than the sum of its proper divisors (1).

198749273 is an equidigital number, since it uses as much as digits as its factorization.

198749273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 50.

The square root of 198749273 is about 14097.8463958152. The cubic root of 198749273 is about 583.5819483026.

The spelling of 198749273 in words is "one hundred ninety-eight million, seven hundred forty-nine thousand, two hundred seventy-three".