196698181 has 2 divisors, whose sum is σ = 196698182. Its totient is φ = 196698180.

The previous prime is 196698169. The next prime is 196698191. The reversal of 196698181 is 181896691.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185368225 + 11329956 = 13615^2 + 3366^2 .

It is a cyclic number.

It is not a de Polignac number, because 196698181 - 2¹³ = 196689989 is a prime.

It is a super-2 number, since 2×196698181² = 77380348817417522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196698101) 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, 98349090 + 98349091.

It is an arithmetic number, because the mean of its divisors is an integer number (98349091).

Almost surely, 2^196698181 is an apocalyptic number.

It is an amenable number.

196698181 is a deficient number, since it is larger than the sum of its proper divisors (1).

196698181 is an equidigital number, since it uses as much as digits as its factorization.

196698181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 49.

The square root of 196698181 is about 14024.9128696046. The cubic root of 196698181 is about 581.5674811471.

The spelling of 196698181 in words is "one hundred ninety-six million, six hundred ninety-eight thousand, one hundred eighty-one".