2650690909 has 2 divisors, whose sum is σ = 2650690910. Its totient is φ = 2650690908.

The previous prime is 2650690907. The next prime is 2650690921. The reversal of 2650690909 is 9090960562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2582875684 + 67815225 = 50822^2 + 8235^2 .

It is a cyclic number.

It is not a de Polignac number, because 2650690909 - 2¹ = 2650690907 is a prime.

Together with 2650690907, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2650690901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1325345454 + 1325345455.

It is an arithmetic number, because the mean of its divisors is an integer number (1325345455).

Almost surely, 2^2650690909 is an apocalyptic number.

It is an amenable number.

2650690909 is a deficient number, since it is larger than the sum of its proper divisors (1).

2650690909 is an equidigital number, since it uses as much as digits as its factorization.

2650690909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 262440, while the sum is 46.

The square root of 2650690909 is about 51484.8609690266. The cubic root of 2650690909 is about 1383.9477572039.

The spelling of 2650690909 in words is "two billion, six hundred fifty million, six hundred ninety thousand, nine hundred nine".