4591009 has 2 divisors, whose sum is σ = 4591010. Its totient is φ = 4591008.

The previous prime is 4591001. The next prime is 4591033. The reversal of 4591009 is 9001954.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4397409 + 193600 = 2097^2 + 440^2 .

It is a cyclic number.

It is not a de Polignac number, because 4591009 - 2³ = 4591001 is a prime.

4591009 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (4591001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2295504 + 2295505.

It is an arithmetic number, because the mean of its divisors is an integer number (2295505).

Almost surely, 2^4591009 is an apocalyptic number.

It is an amenable number.

4591009 is a deficient number, since it is larger than the sum of its proper divisors (1).

4591009 is an equidigital number, since it uses as much as digits as its factorization.

4591009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 4591009 is about 2142.6639960572. The cubic root of 4591009 is about 166.2019244034.

The spelling of 4591009 in words is "four million, five hundred ninety-one thousand, nine".