4009289 has 4 divisors (see below), whose sum is σ = 4021524. Its totient is φ = 3997056.

The previous prime is 4009249. The next prime is 4009307. The reversal of 4009289 is 9829004.

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 2917264 + 1092025 = 1708^2 + 1045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4009289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4009219) 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, 5612 + ... + 6285.

It is an arithmetic number, because the mean of its divisors is an integer number (1005381).

Almost surely, 2^4009289 is an apocalyptic number.

It is an amenable number.

4009289 is a deficient number, since it is larger than the sum of its proper divisors (12235).

4009289 is a wasteful number, since it uses less digits than its factorization.

4009289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12234.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 4009289 is about 2002.3209033519. The cubic root of 4009289 is about 158.8628882712.

The spelling of 4009289 in words is "four million, nine thousand, two hundred eighty-nine".