196588661 has 2 divisors, whose sum is σ = 196588662. Its totient is φ = 196588660.

The previous prime is 196588657. The next prime is 196588703. The reversal of 196588661 is 166885691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150430225 + 46158436 = 12265^2 + 6794^2 .

It is a cyclic number.

It is not a de Polignac number, because 196588661 - 2² = 196588657 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196588621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98294330 + 98294331.

It is an arithmetic number, because the mean of its divisors is an integer number (98294331).

Almost surely, 2^196588661 is an apocalyptic number.

It is an amenable number.

196588661 is a deficient number, since it is larger than the sum of its proper divisors (1).

196588661 is an equidigital number, since it uses as much as digits as its factorization.

196588661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 50.

The square root of 196588661 is about 14021.0078453726. The cubic root of 196588661 is about 581.4595237083.

The spelling of 196588661 in words is "one hundred ninety-six million, five hundred eighty-eight thousand, six hundred sixty-one".