2132309 has 2 divisors, whose sum is σ = 2132310. Its totient is φ = 2132308.

The previous prime is 2132303. The next prime is 2132311. The reversal of 2132309 is 9032312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1162084 + 970225 = 1078^2 + 985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2132309 is a prime.

It is a Sophie Germain prime.

Together with 2132311, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2132303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1066154 + 1066155.

It is an arithmetic number, because the mean of its divisors is an integer number (1066155).

2^2132309 is an apocalyptic number.

It is an amenable number.

2132309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2132309 is an equidigital number, since it uses as much as digits as its factorization.

2132309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 2132309 is about 1460.2427880322. The cubic root of 2132309 is about 128.7113108372.

The spelling of 2132309 in words is "two million, one hundred thirty-two thousand, three hundred nine".