197942281 has 2 divisors, whose sum is σ = 197942282. Its totient is φ = 197942280.

The previous prime is 197942273. The next prime is 197942299. The reversal of 197942281 is 182249791.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148718025 + 49224256 = 12195^2 + 7016^2 .

It is a cyclic number.

It is not a de Polignac number, because 197942281 - 2³ = 197942273 is a prime.

It is a super-2 number, since 2×197942281² = 78362293214965922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (197942681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98971140 + 98971141.

It is an arithmetic number, because the mean of its divisors is an integer number (98971141).

Almost surely, 2^197942281 is an apocalyptic number.

It is an amenable number.

197942281 is a deficient number, since it is larger than the sum of its proper divisors (1).

197942281 is an equidigital number, since it uses as much as digits as its factorization.

197942281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 43.

The square root of 197942281 is about 14069.1961746221. The cubic root of 197942281 is about 582.7910274934.

The spelling of 197942281 in words is "one hundred ninety-seven million, nine hundred forty-two thousand, two hundred eighty-one".