2009291 has 4 divisors (see below), whose sum is σ = 2013000. Its totient is φ = 2005584.

The previous prime is 2009251. The next prime is 2009299. The reversal of 2009291 is 1929002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1929002 = 2 ⋅964501.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2009291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2009299) 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, 866 + ... + 2183.

It is an arithmetic number, because the mean of its divisors is an integer number (503250).

2^2009291 is an apocalyptic number.

2009291 is a deficient number, since it is larger than the sum of its proper divisors (3709).

2009291 is an equidigital number, since it uses as much as digits as its factorization.

2009291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3708.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 2009291 is about 1417.4946208011. The cubic root of 2009291 is about 126.1869024309.

The spelling of 2009291 in words is "two million, nine thousand, two hundred ninety-one".