196091657 has 2 divisors, whose sum is σ = 196091658. Its totient is φ = 196091656.

The previous prime is 196091627. The next prime is 196091659. The reversal of 196091657 is 756190691.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171845881 + 24245776 = 13109^2 + 4924^2 .

It is a cyclic number.

It is not a de Polignac number, because 196091657 - 2¹⁰ = 196090633 is a prime.

Together with 196091659, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (196091659) 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, 98045828 + 98045829.

It is an arithmetic number, because the mean of its divisors is an integer number (98045829).

Almost surely, 2^196091657 is an apocalyptic number.

It is an amenable number.

196091657 is a deficient number, since it is larger than the sum of its proper divisors (1).

196091657 is an equidigital number, since it uses as much as digits as its factorization.

196091657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 196091657 is about 14003.2730816763. The cubic root of 196091657 is about 580.9691061630.

The spelling of 196091657 in words is "one hundred ninety-six million, ninety-one thousand, six hundred fifty-seven".