2608772209 has 4 divisors (see below), whose sum is σ = 2679279604. Its totient is φ = 2538264816.

The previous prime is 2608772129. The next prime is 2608772239. The reversal of 2608772209 is 9022778062.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1198544400 + 1410227809 = 34620^2 + 37553^2 .

It is a cyclic number.

It is not a de Polignac number, because 2608772209 - 2⁷ = 2608772081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2608772239) 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 in 3 ways as a sum of consecutive naturals, for example, 35253642 + ... + 35253715.

It is an arithmetic number, because the mean of its divisors is an integer number (669819901).

Almost surely, 2^2608772209 is an apocalyptic number.

It is an amenable number.

2608772209 is a deficient number, since it is larger than the sum of its proper divisors (70507395).

2608772209 is an equidigital number, since it uses as much as digits as its factorization.

2608772209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70507394.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 2608772209 is about 51076.1412892556. The cubic root of 2608772209 is about 1376.6135915598.

The spelling of 2608772209 in words is "two billion, six hundred eight million, seven hundred seventy-two thousand, two hundred nine".