4022009 has 4 divisors (see below), whose sum is σ = 4057716. Its totient is φ = 3986304.

The previous prime is 4022003. The next prime is 4022017. The reversal of 4022009 is 9002204.

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

It can be written as a sum of positive squares in 2 ways, for example, as 133225 + 3888784 = 365^2 + 1972^2 .

It is a cyclic number.

It is not a de Polignac number, because 4022009 - 2²⁰ = 2973433 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4022003) 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, 17684 + ... + 17909.

It is an arithmetic number, because the mean of its divisors is an integer number (1014429).

Almost surely, 2^4022009 is an apocalyptic number.

It is an amenable number.

4022009 is a deficient number, since it is larger than the sum of its proper divisors (35707).

4022009 is a wasteful number, since it uses less digits than its factorization.

4022009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35706.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 4022009 is about 2005.4947020623. The cubic root of 4022009 is about 159.0307154246.

The spelling of 4022009 in words is "four million, twenty-two thousand, nine".