197942273 has 2 divisors, whose sum is σ = 197942274. Its totient is φ = 197942272.

The previous prime is 197942263. The next prime is 197942281. The reversal of 197942273 is 372249791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167780209 + 30162064 = 12953^2 + 5492^2 .

It is an emirp because it is prime and its reverse (372249791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 197942273 - 2⁴ = 197942257 is a prime.

It is a super-2 number, since 2×197942273² = 78362286880813058, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (197942233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98971136 + 98971137.

It is an arithmetic number, because the mean of its divisors is an integer number (98971137).

Almost surely, 2^197942273 is an apocalyptic number.

It is an amenable number.

197942273 is a deficient number, since it is larger than the sum of its proper divisors (1).

197942273 is an equidigital number, since it uses as much as digits as its factorization.

197942273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 44.

The square root of 197942273 is about 14069.1958903130. The cubic root of 197942273 is about 582.7910196421.

The spelling of 197942273 in words is "one hundred ninety-seven million, nine hundred forty-two thousand, two hundred seventy-three".