4312009 has 4 divisors (see below), whose sum is σ = 4643716. Its totient is φ = 3980304.

The previous prime is 4312003. The next prime is 4312013. The reversal of 4312009 is 9002134.

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 2569609 + 1742400 = 1603^2 + 1320^2 .

It is a cyclic number.

It is not a de Polignac number, because 4312009 - 2⁵ = 4311977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4312003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165834 + ... + 165859.

It is an arithmetic number, because the mean of its divisors is an integer number (1160929).

Almost surely, 2^4312009 is an apocalyptic number.

It is an amenable number.

4312009 is a deficient number, since it is larger than the sum of its proper divisors (331707).

4312009 is a wasteful number, since it uses less digits than its factorization.

4312009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331706.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 4312009 is about 2076.5377434566. The cubic root of 4312009 is about 162.7645741285.

The spelling of 4312009 in words is "four million, three hundred twelve thousand, nine".