198772393 has 2 divisors, whose sum is σ = 198772394. Its totient is φ = 198772392.

The previous prime is 198772367. The next prime is 198772397. The reversal of 198772393 is 393277891.

198772393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152695449 + 46076944 = 12357^2 + 6788^2 .

It is an emirp because it is prime and its reverse (393277891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198772393 - 2¹⁷ = 198641321 is a prime.

It is not a weakly prime, because it can be changed into another prime (198772397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99386196 + 99386197.

It is an arithmetic number, because the mean of its divisors is an integer number (99386197).

Almost surely, 2^198772393 is an apocalyptic number.

It is an amenable number.

198772393 is a deficient number, since it is larger than the sum of its proper divisors (1).

198772393 is an equidigital number, since it uses as much as digits as its factorization.

198772393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536, while the sum is 49.

The square root of 198772393 is about 14098.6663553685. Note that the first 3 decimals coincide. The cubic root of 198772393 is about 583.6045762957.

The spelling of 198772393 in words is "one hundred ninety-eight million, seven hundred seventy-two thousand, three hundred ninety-three".