2117049509 has 2 divisors, whose sum is σ = 2117049510. Its totient is φ = 2117049508.

The previous prime is 2117049439. The next prime is 2117049547. The reversal of 2117049509 is 9059407112.

It is an a-pointer prime, because the next prime (2117049547) can be obtained adding 2117049509 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1460921284 + 656128225 = 38222^2 + 25615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2117049509 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2117040509) 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 as a sum of consecutive naturals, namely, 1058524754 + 1058524755.

It is an arithmetic number, because the mean of its divisors is an integer number (1058524755).

Almost surely, 2^2117049509 is an apocalyptic number.

It is an amenable number.

2117049509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2117049509 is an equidigital number, since it uses as much as digits as its factorization.

2117049509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 2117049509 is about 46011.4062923532. The cubic root of 2117049509 is about 1284.0354228265.

The spelling of 2117049509 in words is "two billion, one hundred seventeen million, forty-nine thousand, five hundred nine".