200687021 has 4 divisors (see below), whose sum is σ = 201211392. Its totient is φ = 200162652.

The previous prime is 200687017. The next prime is 200687027. The reversal of 200687021 is 120786002.

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 cyclic number.

It is not a de Polignac number, because 200687021 - 2² = 200687017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200687027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261611 + ... + 262376.

It is an arithmetic number, because the mean of its divisors is an integer number (50302848).

Almost surely, 2^200687021 is an apocalyptic number.

It is an amenable number.

200687021 is a deficient number, since it is larger than the sum of its proper divisors (524371).

200687021 is an equidigital number, since it uses as much as digits as its factorization.

200687021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524370.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 200687021 is about 14166.4046603223. The cubic root of 200687021 is about 585.4724028937.

The spelling of 200687021 in words is "two hundred million, six hundred eighty-seven thousand, twenty-one".