2125344209 has 2 divisors, whose sum is σ = 2125344210. Its totient is φ = 2125344208.

The previous prime is 2125344139. The next prime is 2125344211. The reversal of 2125344209 is 9024435212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1326999184 + 798345025 = 36428^2 + 28255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2125344209 is a prime.

It is a Sophie Germain prime.

Together with 2125344211, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2125344289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062672104 + 1062672105.

It is an arithmetic number, because the mean of its divisors is an integer number (1062672105).

Almost surely, 2^2125344209 is an apocalyptic number.

It is an amenable number.

2125344209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2125344209 is an equidigital number, since it uses as much as digits as its factorization.

2125344209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 2125344209 is about 46101.4556060869. The cubic root of 2125344209 is about 1285.7102079159.

The spelling of 2125344209 in words is "two billion, one hundred twenty-five million, three hundred forty-four thousand, two hundred nine".