4581909 has 6 divisors (see below), whose sum is σ = 6618326. Its totient is φ = 3054600.

The previous prime is 4581859. The next prime is 4581911. The reversal of 4581909 is 9091854.

It can be written as a sum of positive squares in only one way, i.e., 2340900 + 2241009 = 1530^2 + 1497^2 .

It is not a de Polignac number, because 4581909 - 2⁷ = 4581781 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 (4581919) 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 5 ways as a sum of consecutive naturals, for example, 254542 + ... + 254559.

Almost surely, 2^4581909 is an apocalyptic number.

It is an amenable number.

4581909 is a deficient number, since it is larger than the sum of its proper divisors (2036417).

4581909 is a wasteful number, since it uses less digits than its factorization.

4581909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509107 (or 509104 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 4581909 is about 2140.5394179972. The cubic root of 4581909 is about 166.0920402146.

The spelling of 4581909 in words is "four million, five hundred eighty-one thousand, nine hundred nine".