196571857 has 2 divisors, whose sum is σ = 196571858. Its totient is φ = 196571856.

The previous prime is 196571821. The next prime is 196571863. The reversal of 196571857 is 758175691.

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., 192765456 + 3806401 = 13884^2 + 1951^2 .

It is a cyclic number.

It is not a de Polignac number, because 196571857 - 2⁷ = 196571729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 196571857.

It is not a weakly prime, because it can be changed into another prime (196571887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98285928 + 98285929.

It is an arithmetic number, because the mean of its divisors is an integer number (98285929).

Almost surely, 2^196571857 is an apocalyptic number.

It is an amenable number.

196571857 is a deficient number, since it is larger than the sum of its proper divisors (1).

196571857 is an equidigital number, since it uses as much as digits as its factorization.

196571857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 529200, while the sum is 49.

The square root of 196571857 is about 14020.4085889107. The cubic root of 196571857 is about 581.4429559094.

The spelling of 196571857 in words is "one hundred ninety-six million, five hundred seventy-one thousand, eight hundred fifty-seven".