196661243 has 2 divisors, whose sum is σ = 196661244. Its totient is φ = 196661242.

The previous prime is 196661237. The next prime is 196661251. The reversal of 196661243 is 342166691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 196661243 - 2²⁰ = 195612667 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 196661197 and 196661206.

It is not a weakly prime, because it can be changed into another prime (196661203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98330621 + 98330622.

It is an arithmetic number, because the mean of its divisors is an integer number (98330622).

Almost surely, 2^196661243 is an apocalyptic number.

196661243 is a deficient number, since it is larger than the sum of its proper divisors (1).

196661243 is an equidigital number, since it uses as much as digits as its factorization.

196661243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 38.

The square root of 196661243 is about 14023.5959368487. The cubic root of 196661243 is about 581.5310746344.

The spelling of 196661243 in words is "one hundred ninety-six million, six hundred sixty-one thousand, two hundred forty-three".