2000091 has 4 divisors (see below), whose sum is σ = 2666792. Its totient is φ = 1333392.

The previous prime is 2000083. The next prime is 2000093. The reversal of 2000091 is 1900002.

It is a happy number.

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

It is not a de Polignac number, because 2000091 - 2³ = 2000083 is a prime.

It is a D-number.

It is a Duffinian number.

2000091 is a modest number, since divided by 91 gives 2 as remainder.

2000091 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2000093) 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, 333346 + ... + 333351.

It is an arithmetic number, because the mean of its divisors is an integer number (666698).

2^2000091 is an apocalyptic number.

2000091 is a deficient number, since it is larger than the sum of its proper divisors (666701).

2000091 is an equidigital number, since it uses as much as digits as its factorization.

2000091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666700.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 2000091 is about 1414.2457353657. The cubic root of 2000091 is about 125.9940158408.

Adding to 2000091 its reverse (1900002), we get a palindrome (3900093).

The spelling of 2000091 in words is "two million, ninety-one", and thus it is an aban number and an uban number.