200643 has 8 divisors (see below), whose sum is σ = 273408. Its totient is φ = 130824.

The previous prime is 200639. The next prime is 200657. The reversal of 200643 is 346002.

200643 is nontrivially palindromic in base 2 and base 4.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 200643 - 2² = 200639 is a prime.

It is a super-2 number, since 2×200643² = 80515226898, which contains 22 as substring.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (200443) 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, 571 + ... + 852.

It is an arithmetic number, because the mean of its divisors is an integer number (34176).

2²⁰⁰⁶⁴³ is an apocalyptic number.

200643 is a deficient number, since it is larger than the sum of its proper divisors (72765).

200643 is a wasteful number, since it uses less digits than its factorization.

200643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 200643 is about 447.9319144692. The cubic root of 200643 is about 58.5429591679.

Adding to 200643 its reverse (346002), we get a palindrome (546645).

The spelling of 200643 in words is "two hundred thousand, six hundred forty-three".