2199999509 has 2 divisors, whose sum is σ = 2199999510. Its totient is φ = 2199999508.

The previous prime is 2199999499. The next prime is 2199999511. The reversal of 2199999509 is 9059999912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2166902500 + 33097009 = 46550^2 + 5753^2 .

It is a cyclic number.

It is not a de Polignac number, because 2199999509 - 2²⁰ = 2198950933 is a prime.

Together with 2199999511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2199999209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1099999754 + 1099999755.

It is an arithmetic number, because the mean of its divisors is an integer number (1099999755).

Almost surely, 2^2199999509 is an apocalyptic number.

It is an amenable number.

2199999509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2199999509 is an equidigital number, since it uses as much as digits as its factorization.

2199999509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5314410, while the sum is 62.

The square root of 2199999509 is about 46904.1523641564. The cubic root of 2199999509 is about 1300.5913500953.

The spelling of 2199999509 in words is "two billion, one hundred ninety-nine million, nine hundred ninety-nine thousand, five hundred nine".