2306509 has 12 divisors (see below), whose sum is σ = 2564064. Its totient is φ = 2070464.

The previous prime is 2306453. The next prime is 2306519. The reversal of 2306509 is 9056032.

2306509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2306509 - 2¹¹ = 2304461 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2306519) 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 11 ways as a sum of consecutive naturals, for example, 6474 + ... + 6820.

It is an arithmetic number, because the mean of its divisors is an integer number (213672).

2^2306509 is an apocalyptic number.

It is an amenable number.

2306509 is a deficient number, since it is larger than the sum of its proper divisors (257555).

2306509 is a wasteful number, since it uses less digits than its factorization.

2306509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404 (or 387 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 2306509 is about 1518.7195264432. The cubic root of 2306509 is about 132.1250154770.

The spelling of 2306509 in words is "two million, three hundred six thousand, five hundred nine".