4665509 has 2 divisors, whose sum is σ = 4665510. Its totient is φ = 4665508.

The previous prime is 4665499. The next prime is 4665533. The reversal of 4665509 is 9055664.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4060225 + 605284 = 2015^2 + 778^2 .

It is a cyclic number.

It is not a de Polignac number, because 4665509 - 2²⁰ = 3616933 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4665539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2332754 + 2332755.

It is an arithmetic number, because the mean of its divisors is an integer number (2332755).

Almost surely, 2^4665509 is an apocalyptic number.

It is an amenable number.

4665509 is a deficient number, since it is larger than the sum of its proper divisors (1).

4665509 is an equidigital number, since it uses as much as digits as its factorization.

4665509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 4665509 is about 2159.9789350825. The cubic root of 4665509 is about 167.0961116229.

The spelling of 4665509 in words is "four million, six hundred sixty-five thousand, five hundred nine".