2247809 has 2 divisors, whose sum is σ = 2247810. Its totient is φ = 2247808.

The previous prime is 2247803. The next prime is 2247811. The reversal of 2247809 is 9087422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1373584 + 874225 = 1172^2 + 935^2 .

It is a cyclic number.

It is not a de Polignac number, because 2247809 - 2⁴ = 2247793 is a prime.

Together with 2247811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2247803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1123904 + 1123905.

It is an arithmetic number, because the mean of its divisors is an integer number (1123905).

2^2247809 is an apocalyptic number.

It is an amenable number.

2247809 is a deficient number, since it is larger than the sum of its proper divisors (1).

2247809 is an equidigital number, since it uses as much as digits as its factorization.

2247809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 2247809 is about 1499.2694887845. The cubic root of 2247809 is about 130.9945222347.

The spelling of 2247809 in words is "two million, two hundred forty-seven thousand, eight hundred nine".