200721689 has 12 divisors (see below), whose sum is σ = 233826768. Its totient is φ = 171801000.

The previous prime is 200721649. The next prime is 200721751. The reversal of 200721689 is 986127002.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-200721689 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (200721649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37214 + ... + 42264.

It is an arithmetic number, because the mean of its divisors is an integer number (19485564).

Almost surely, 2^200721689 is an apocalyptic number.

It is an amenable number.

200721689 is a deficient number, since it is larger than the sum of its proper divisors (33105079).

200721689 is an equidigital number, since it uses as much as digits as its factorization.

200721689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5876 (or 5869 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 200721689 is about 14167.6282065842. The cubic root of 200721689 is about 585.5061137411.

The spelling of 200721689 in words is "two hundred million, seven hundred twenty-one thousand, six hundred eighty-nine".