196643 has 2 divisors, whose sum is σ = 196644. Its totient is φ = 196642.

The previous prime is 196613. The next prime is 196657. The reversal of 196643 is 346691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 196643 - 2⁶ = 196579 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (196613) 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, 98321 + 98322.

It is an arithmetic number, because the mean of its divisors is an integer number (98322).

2¹⁹⁶⁶⁴³ is an apocalyptic number.

196643 is a deficient number, since it is larger than the sum of its proper divisors (1).

196643 is an equidigital number, since it uses as much as digits as its factorization.

196643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 29.

The square root of 196643 is about 443.4444722849. Note that the first 4 decimals coincide. The cubic root of 196643 is about 58.1513092445.

The spelling of 196643 in words is "one hundred ninety-six thousand, six hundred forty-three".