196657 has 2 divisors, whose sum is σ = 196658. Its totient is φ = 196656.

The previous prime is 196643. The next prime is 196661. The reversal of 196657 is 756691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190096 + 6561 = 436^2 + 81^2 .

It is a cyclic number.

It is not a de Polignac number, because 196657 - 2¹¹ = 194609 is a prime.

It is not a weakly prime, because it can be changed into another prime (196687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98328 + 98329.

It is an arithmetic number, because the mean of its divisors is an integer number (98329).

2¹⁹⁶⁶⁵⁷ is an apocalyptic number.

It is an amenable number.

196657 is a deficient number, since it is larger than the sum of its proper divisors (1).

196657 is an equidigital number, since it uses as much as digits as its factorization.

196657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 34.

The square root of 196657 is about 443.4602575203. The cubic root of 196657 is about 58.1526892394.

Adding to 196657 its sum of digits (34), we get a palindrome (196691).

The spelling of 196657 in words is "one hundred ninety-six thousand, six hundred fifty-seven".