2725761209 has 2 divisors, whose sum is σ = 2725761210. Its totient is φ = 2725761208.

The previous prime is 2725761173. The next prime is 2725761229. The reversal of 2725761209 is 9021675272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2719309609 + 6451600 = 52147^2 + 2540^2 .

It is a cyclic number.

It is not a de Polignac number, because 2725761209 - 2²⁴ = 2708983993 is a prime.

It is not a weakly prime, because it can be changed into another prime (2725761229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1362880604 + 1362880605.

It is an arithmetic number, because the mean of its divisors is an integer number (1362880605).

Almost surely, 2^2725761209 is an apocalyptic number.

It is an amenable number.

2725761209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2725761209 is an equidigital number, since it uses as much as digits as its factorization.

2725761209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 2725761209 is about 52208.8230953351. The cubic root of 2725761209 is about 1396.8912668900.

The spelling of 2725761209 in words is "two billion, seven hundred twenty-five million, seven hundred sixty-one thousand, two hundred nine".