200649 has 4 divisors (see below), whose sum is σ = 267536. Its totient is φ = 133764.

The previous prime is 200639. The next prime is 200657. The reversal of 200649 is 946002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-200649 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33439 + ... + 33444.

It is an arithmetic number, because the mean of its divisors is an integer number (66884).

2²⁰⁰⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

200649 is a deficient number, since it is larger than the sum of its proper divisors (66887).

200649 is an equidigital number, since it uses as much as digits as its factorization.

200649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66886.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 200649 is about 447.9386118655. The cubic root of 200649 is about 58.5435427156.

The spelling of 200649 in words is "two hundred thousand, six hundred forty-nine".