196858289 has 2 divisors, whose sum is σ = 196858290. Its totient is φ = 196858288.

The previous prime is 196858273. The next prime is 196858307. The reversal of 196858289 is 982858691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184552225 + 12306064 = 13585^2 + 3508^2 .

It is a cyclic number.

It is not a de Polignac number, because 196858289 - 2⁴ = 196858273 is a prime.

It is not a weakly prime, because it can be changed into another prime (196858229) 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, 98429144 + 98429145.

It is an arithmetic number, because the mean of its divisors is an integer number (98429145).

Almost surely, 2^196858289 is an apocalyptic number.

It is an amenable number.

196858289 is a deficient number, since it is larger than the sum of its proper divisors (1).

196858289 is an equidigital number, since it uses as much as digits as its factorization.

196858289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2488320, while the sum is 56.

The square root of 196858289 is about 14030.6196940834. The cubic root of 196858289 is about 581.7252327390.

The spelling of 196858289 in words is "one hundred ninety-six million, eight hundred fifty-eight thousand, two hundred eighty-nine".