12082309 has 6 divisors (see below), whose sum is σ = 12752070. Its totient is φ = 11446056.

The previous prime is 12082307. The next prime is 12082319. The reversal of 12082309 is 90328021.

It can be written as a sum of positive squares in only one way, i.e., 9474084 + 2608225 = 3078^2 + 1615^2 .

It is not a de Polignac number, because 12082309 - 2¹ = 12082307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12082307) 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 5 ways as a sum of consecutive naturals, for example, 16374 + ... + 17095.

It is an arithmetic number, because the mean of its divisors is an integer number (2125345).

Almost surely, 2^12082309 is an apocalyptic number.

12082309 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12082309 is a deficient number, since it is larger than the sum of its proper divisors (669761).

12082309 is an equidigital number, since it uses as much as digits as its factorization.

12082309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33507 (or 33488 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 12082309 is about 3475.9615935738. The cubic root of 12082309 is about 229.4651022893.

The spelling of 12082309 in words is "twelve million, eighty-two thousand, three hundred nine".