200691 has 8 divisors (see below), whose sum is σ = 297360. Its totient is φ = 133776.

The previous prime is 200689. The next prime is 200699. The reversal of 200691 is 196002.

It is not a de Polignac number, because 200691 - 2¹ = 200689 is a prime.

200691 is a lucky number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (200699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3690 + ... + 3743.

It is an arithmetic number, because the mean of its divisors is an integer number (37170).

2²⁰⁰⁶⁹¹ is an apocalyptic number.

200691 is a deficient number, since it is larger than the sum of its proper divisors (96669).

200691 is an equidigital number, since it uses as much as digits as its factorization.

200691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7442 (or 7436 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 200691 is about 447.9854908365. The cubic root of 200691 is about 58.5476272234.

Adding to 200691 its reverse (196002), we get a palindrome (396693).

The spelling of 200691 in words is "two hundred thousand, six hundred ninety-one".