4785509 has 2 divisors, whose sum is σ = 4785510. Its totient is φ = 4785508.

The previous prime is 4785503. The next prime is 4785523. The reversal of 4785509 is 9055874.

4785509 = 1262² + 1263² + 1264².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4264225 + 521284 = 2065^2 + 722^2 .

It is a cyclic number.

It is not a de Polignac number, because 4785509 - 2¹⁶ = 4719973 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4785503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2392754 + 2392755.

It is an arithmetic number, because the mean of its divisors is an integer number (2392755).

Almost surely, 2^4785509 is an apocalyptic number.

It is an amenable number.

4785509 is a deficient number, since it is larger than the sum of its proper divisors (1).

4785509 is an equidigital number, since it uses as much as digits as its factorization.

4785509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 4785509 is about 2187.5806270855. The cubic root of 4785509 is about 168.5166094097.

The spelling of 4785509 in words is "four million, seven hundred eighty-five thousand, five hundred nine".