198383281 has 2 divisors, whose sum is σ = 198383282. Its totient is φ = 198383280.

The previous prime is 198383249. The next prime is 198383309. The reversal of 198383281 is 182383891.

198383281 = 9959² + 9960².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99201600 + 99181681 = 9960^2 + 9959^2 .

It is an emirp because it is prime and its reverse (182383891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198383281 - 2⁵ = 198383249 is a prime.

It is a super-2 number, since 2×198383281² = 78711852360649922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (198383201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99191640 + 99191641.

It is an arithmetic number, because the mean of its divisors is an integer number (99191641).

Almost surely, 2^198383281 is an apocalyptic number.

198383281 is the 9960-th centered square number.

It is an amenable number.

198383281 is a deficient number, since it is larger than the sum of its proper divisors (1).

198383281 is an equidigital number, since it uses as much as digits as its factorization.

198383281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 43.

The square root of 198383281 is about 14084.8599922044. The cubic root of 198383281 is about 583.2235108265.

It can be divided in two parts, 1983 and 83281, that added together give a square (85264 = 292²).

The spelling of 198383281 in words is "one hundred ninety-eight million, three hundred eighty-three thousand, two hundred eighty-one".