2818009 has 4 divisors (see below), whose sum is σ = 2853760. Its totient is φ = 2782260.

The previous prime is 2817973. The next prime is 2818027. The reversal of 2818009 is 9008182.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9008182 = 2 ⋅4504091.

It is a cyclic number.

It is not a de Polignac number, because 2818009 - 2¹⁵ = 2785241 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2818609) 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, 17757 + ... + 17914.

It is an arithmetic number, because the mean of its divisors is an integer number (713440).

2^2818009 is an apocalyptic number.

It is an amenable number.

2818009 is a deficient number, since it is larger than the sum of its proper divisors (35751).

2818009 is an equidigital number, since it uses as much as digits as its factorization.

2818009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35750.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 2818009 is about 1678.6926460791. The cubic root of 2818009 is about 141.2475072001.

The spelling of 2818009 in words is "two million, eight hundred eighteen thousand, nine".