200639191 has 4 divisors (see below), whose sum is σ = 200967112. Its totient is φ = 200311272.

The previous prime is 200639177. The next prime is 200639213. The reversal of 200639191 is 191936002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 200639191 - 2⁷ = 200639063 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 (200639111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163041 + ... + 164266.

It is an arithmetic number, because the mean of its divisors is an integer number (50241778).

Almost surely, 2^200639191 is an apocalyptic number.

200639191 is a deficient number, since it is larger than the sum of its proper divisors (327921).

200639191 is an equidigital number, since it uses as much as digits as its factorization.

200639191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327920.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 200639191 is about 14164.7164108569. The cubic root of 200639191 is about 585.4258870638.

The spelling of 200639191 in words is "two hundred million, six hundred thirty-nine thousand, one hundred ninety-one".