200388921 has 4 divisors (see below), whose sum is σ = 267185232. Its totient is φ = 133592612.

The previous prime is 200388917. The next prime is 200388931. The reversal of 200388921 is 129883002.

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 200388921 - 2² = 200388917 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (200388931) 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, 33398151 + ... + 33398156.

It is an arithmetic number, because the mean of its divisors is an integer number (66796308).

Almost surely, 2^200388921 is an apocalyptic number.

It is an amenable number.

200388921 is a deficient number, since it is larger than the sum of its proper divisors (66796311).

200388921 is an equidigital number, since it uses as much as digits as its factorization.

200388921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66796310.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 200388921 is about 14155.8793792544. The cubic root of 200388921 is about 585.1823728277.

The spelling of 200388921 in words is "two hundred million, three hundred eighty-eight thousand, nine hundred twenty-one".