196181 has 2 divisors, whose sum is σ = 196182. Its totient is φ = 196180.

The previous prime is 196177. The next prime is 196187. The reversal of 196181 is 181691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167281 + 28900 = 409^2 + 170^2 .

It is a cyclic number.

It is not a de Polignac number, because 196181 - 2² = 196177 is a prime.

It is a super-2 number, since 2×196181² = 76973969522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 196181.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 196181.

It is not a weakly prime, because it can be changed into another prime (196187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98090 + 98091.

It is an arithmetic number, because the mean of its divisors is an integer number (98091).

2¹⁹⁶¹⁸¹ is an apocalyptic number.

It is an amenable number.

196181 is a deficient number, since it is larger than the sum of its proper divisors (1).

196181 is an equidigital number, since it uses as much as digits as its factorization.

196181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 26.

The square root of 196181 is about 442.9232439148. The cubic root of 196181 is about 58.1057326204.

The spelling of 196181 in words is "one hundred ninety-six thousand, one hundred eighty-one".