2985509 has 4 divisors (see below), whose sum is σ = 2990316. Its totient is φ = 2980704.

The previous prime is 2985503. The next prime is 2985511. The reversal of 2985509 is 9055892.

It is a happy number.

2985509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1768900 + 1216609 = 1330^2 + 1103^2 .

It is a cyclic number.

It is not a de Polignac number, because 2985509 - 2⁸ = 2985253 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2985503) 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, 1304 + ... + 2769.

It is an arithmetic number, because the mean of its divisors is an integer number (747579).

2^2985509 is an apocalyptic number.

It is an amenable number.

2985509 is a deficient number, since it is larger than the sum of its proper divisors (4807).

2985509 is an equidigital number, since it uses as much as digits as its factorization.

2985509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4806.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 2985509 is about 1727.8625524040. The cubic root of 2985509 is about 143.9923639212.

The spelling of 2985509 in words is "two million, nine hundred eighty-five thousand, five hundred nine".