2183509 has 2 divisors, whose sum is σ = 2183510. Its totient is φ = 2183508.

The previous prime is 2183507. The next prime is 2183521. The reversal of 2183509 is 9053812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1203409 + 980100 = 1097^2 + 990^2 .

It is a cyclic number.

It is not a de Polignac number, because 2183509 - 2¹ = 2183507 is a prime.

Together with 2183507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2183501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1091754 + 1091755.

It is an arithmetic number, because the mean of its divisors is an integer number (1091755).

2^2183509 is an apocalyptic number.

It is an amenable number.

2183509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2183509 is an equidigital number, since it uses as much as digits as its factorization.

2183509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 2183509 is about 1477.6701255693. The cubic root of 2183509 is about 129.7333587953.

The spelling of 2183509 in words is "two million, one hundred eighty-three thousand, five hundred nine".