200001091 has 8 divisors (see below), whose sum is σ = 203618160. Its totient is φ = 196391712.

The previous prime is 200001071. The next prime is 200001103. The reversal of 200001091 is 190100002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 200001091 - 2⁵ = 200001059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200001001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84561 + ... + 86893.

It is an arithmetic number, because the mean of its divisors is an integer number (25452270).

Almost surely, 2^200001091 is an apocalyptic number.

200001091 is a deficient number, since it is larger than the sum of its proper divisors (3617069).

200001091 is a wasteful number, since it uses less digits than its factorization.

200001091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3845.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 200001091 is about 14142.1741963533. The cubic root of 200001091 is about 584.8046110084.

Adding to 200001091 its reverse (190100002), we get a palindrome (390101093).

The spelling of 200001091 in words is "two hundred million, one thousand, ninety-one".