200491 has 6 divisors (see below), whose sum is σ = 210140. Its totient is φ = 191268.

The previous prime is 200483. The next prime is 200513. The reversal of 200491 is 194002.

It is not a de Polignac number, because 200491 - 2³ = 200483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 340 + ... + 718.

2²⁰⁰⁴⁹¹ is an apocalyptic number.

200491 is a deficient number, since it is larger than the sum of its proper divisors (9649).

200491 is an equidigital number, since it uses as much as digits as its factorization.

200491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 200491 is about 447.7622136804. The cubic root of 200491 is about 58.5281720787.

Adding to 200491 its reverse (194002), we get a palindrome (394493).

The spelling of 200491 in words is "two hundred thousand, four hundred ninety-one".