2000991091 has 4 divisors (see below), whose sum is σ = 2182899384. Its totient is φ = 1819082800.

The previous prime is 2000991067. The next prime is 2000991107. The reversal of 2000991091 is 1901990002.

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 2000991091 - 2⁷ = 2000990963 is a prime.

It is a super-2 number, since 2×2000991091² = 8007930692522740562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2000991011) 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, 90954130 + ... + 90954151.

It is an arithmetic number, because the mean of its divisors is an integer number (545724846).

Almost surely, 2^2000991091 is an apocalyptic number.

2000991091 is a deficient number, since it is larger than the sum of its proper divisors (181908293).

2000991091 is a wasteful number, since it uses less digits than its factorization.

2000991091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181908292.

The product of its (nonzero) digits is 1458, while the sum is 31.

The square root of 2000991091 is about 44732.4389118233. The cubic root of 2000991091 is about 1260.1291315962.

The spelling of 2000991091 in words is "two billion, nine hundred ninety-one thousand, ninety-one".