200087130721 has 3 divisors (see below), whose sum is σ = 200087578033. Its totient is φ = 200086683410.

The previous prime is 200087130713. The next prime is 200087130731. The reversal of 200087130721 is 127031780002.

The square root of 200087130721 is 447311.

It is a perfect power (a square), and thus also a powerful number.

200087130721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 200087130721 - 2³ = 200087130713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200087130731) 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 2 ways as a sum of consecutive naturals, for example, 223656 + ... + 670966.

Almost surely, 2^200087130721 is an apocalyptic number.

200087130721 is the 447311-st square number.

200087130721 is the 223656-th centered octagonal number.

It is an amenable number.

200087130721 is a deficient number, since it is larger than the sum of its proper divisors (447312).

200087130721 is an frugal number, since it uses more digits than its factorization.

200087130721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894622 (or 447311 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 31.

The spelling of 200087130721 in words is "two hundred billion, eighty-seven million, one hundred thirty thousand, seven hundred twenty-one".