2085309 has 6 divisors (see below), whose sum is σ = 3012126. Its totient is φ = 1390200.

The previous prime is 2085299. The next prime is 2085311. The reversal of 2085309 is 9035802.

It can be written as a sum of positive squares in only one way, i.e., 1625625 + 459684 = 1275^2 + 678^2 .

It is not a de Polignac number, because 2085309 - 2⁸ = 2085053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2085319) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 115842 + ... + 115859.

It is an arithmetic number, because the mean of its divisors is an integer number (502021).

2^2085309 is an apocalyptic number.

It is an amenable number.

2085309 is a deficient number, since it is larger than the sum of its proper divisors (926817).

2085309 is a wasteful number, since it uses less digits than its factorization.

2085309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231707 (or 231704 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 2085309 is about 1444.0599018046. The cubic root of 2085309 is about 127.7585985637.

The spelling of 2085309 in words is "two million, eighty-five thousand, three hundred nine".