196747657 has 2 divisors, whose sum is σ = 196747658. Its totient is φ = 196747656.

The previous prime is 196747637. The next prime is 196747699. The reversal of 196747657 is 756747691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196532361 + 215296 = 14019^2 + 464^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196747657 is a prime.

It is not a weakly prime, because it can be changed into another prime (196747637) 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, 98373828 + 98373829.

It is an arithmetic number, because the mean of its divisors is an integer number (98373829).

Almost surely, 2^196747657 is an apocalyptic number.

It is an amenable number.

196747657 is a deficient number, since it is larger than the sum of its proper divisors (1).

196747657 is an equidigital number, since it uses as much as digits as its factorization.

196747657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2222640, while the sum is 52.

The square root of 196747657 is about 14026.6766199268. The cubic root of 196747657 is about 581.6162381147.

The spelling of 196747657 in words is "one hundred ninety-six million, seven hundred forty-seven thousand, six hundred fifty-seven".