200689 has 2 divisors, whose sum is σ = 200690. Its totient is φ = 200688.

The previous prime is 200671. The next prime is 200699. The reversal of 200689 is 986002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166464 + 34225 = 408^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 200689 - 2⁵ = 200657 is a prime.

200689 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (200609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100344 + 100345.

It is an arithmetic number, because the mean of its divisors is an integer number (100345).

2²⁰⁰⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

200689 is a deficient number, since it is larger than the sum of its proper divisors (1).

200689 is an equidigital number, since it uses as much as digits as its factorization.

200689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 200689 is about 447.9832586158. The cubic root of 200689 is about 58.5474327360.

The spelling of 200689 in words is "two hundred thousand, six hundred eighty-nine".