2193108509 has 2 divisors, whose sum is σ = 2193108510. Its totient is φ = 2193108508.

The previous prime is 2193108481. The next prime is 2193108523. The reversal of 2193108509 is 9058013912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2185562500 + 7546009 = 46750^2 + 2747^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2193108509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2193108569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1096554254 + 1096554255.

It is an arithmetic number, because the mean of its divisors is an integer number (1096554255).

Almost surely, 2^2193108509 is an apocalyptic number.

It is an amenable number.

2193108509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2193108509 is an equidigital number, since it uses as much as digits as its factorization.

2193108509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 2193108509 is about 46830.6364359913. The cubic root of 2193108509 is about 1299.2319939059.

The spelling of 2193108509 in words is "two billion, one hundred ninety-three million, one hundred eight thousand, five hundred nine".