2003091 has 4 divisors (see below), whose sum is σ = 2670792. Its totient is φ = 1335392.

The previous prime is 2003087. The next prime is 2003119. The reversal of 2003091 is 1903002.

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 2003091 - 2² = 2003087 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 2003091.

It is not an unprimeable number, because it can be changed into a prime (2003011) 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, 333846 + ... + 333851.

It is an arithmetic number, because the mean of its divisors is an integer number (667698).

2^2003091 is an apocalyptic number.

2003091 is a deficient number, since it is larger than the sum of its proper divisors (667701).

2003091 is an equidigital number, since it uses as much as digits as its factorization.

2003091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667700.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 2003091 is about 1415.3059739858. The cubic root of 2003091 is about 126.0569785130.

Adding to 2003091 its reverse (1903002), we get a palindrome (3906093).

The spelling of 2003091 in words is "two million, three thousand, ninety-one".