199963289 has 2 divisors, whose sum is σ = 199963290. Its totient is φ = 199963288.

The previous prime is 199963177. The next prime is 199963319. The reversal of 199963289 is 982369991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179560000 + 20403289 = 13400^2 + 4517^2 .

It is an emirp because it is prime and its reverse (982369991) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199963289 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (199933289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99981644 + 99981645.

It is an arithmetic number, because the mean of its divisors is an integer number (99981645).

Almost surely, 2^199963289 is an apocalyptic number.

It is an amenable number.

199963289 is a deficient number, since it is larger than the sum of its proper divisors (1).

199963289 is an equidigital number, since it uses as much as digits as its factorization.

199963289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1889568, while the sum is 56.

The square root of 199963289 is about 14140.8376343129. The cubic root of 199963289 is about 584.7677642480.

The spelling of 199963289 in words is "one hundred ninety-nine million, nine hundred sixty-three thousand, two hundred eighty-nine".