196918289 has 2 divisors, whose sum is σ = 196918290. Its totient is φ = 196918288.

The previous prime is 196918277. The next prime is 196918307. The reversal of 196918289 is 982819691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123387664 + 73530625 = 11108^2 + 8575^2 .

It is a cyclic number.

It is not a de Polignac number, because 196918289 - 2⁴ = 196918273 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 196918289.

It is not a weakly prime, because it can be changed into another prime (196918219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98459144 + 98459145.

It is an arithmetic number, because the mean of its divisors is an integer number (98459145).

Almost surely, 2^196918289 is an apocalyptic number.

It is an amenable number.

196918289 is a deficient number, since it is larger than the sum of its proper divisors (1).

196918289 is an equidigital number, since it uses as much as digits as its factorization.

196918289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872, while the sum is 53.

The square root of 196918289 is about 14032.7577118683. The cubic root of 196918289 is about 581.7843276489.

The spelling of 196918289 in words is "one hundred ninety-six million, nine hundred eighteen thousand, two hundred eighty-nine".