2722009 has 4 divisors (see below), whose sum is σ = 2762704. Its totient is φ = 2681316.

The previous prime is 2722007. The next prime is 2722021. The reversal of 2722009 is 9002272.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2722009 - 2¹ = 2722007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2722001) 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, 20247 + ... + 20380.

It is an arithmetic number, because the mean of its divisors is an integer number (690676).

2^2722009 is an apocalyptic number.

It is an amenable number.

2722009 is a deficient number, since it is larger than the sum of its proper divisors (40695).

2722009 is an equidigital number, since it uses as much as digits as its factorization.

2722009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40694.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 2722009 is about 1649.8512054122. The cubic root of 2722009 is about 139.6249998330.

The spelling of 2722009 in words is "two million, seven hundred twenty-two thousand, nine".