2117719459 has 2 divisors, whose sum is σ = 2117719460. Its totient is φ = 2117719458.

The previous prime is 2117719421. The next prime is 2117719481. The reversal of 2117719459 is 9549177112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2117719459 - 2⁹ = 2117718947 is a prime.

It is not a weakly prime, because it can be changed into another prime (2117719159) 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, 1058859729 + 1058859730.

It is an arithmetic number, because the mean of its divisors is an integer number (1058859730).

Almost surely, 2^2117719459 is an apocalyptic number.

2117719459 is a deficient number, since it is larger than the sum of its proper divisors (1).

2117719459 is an equidigital number, since it uses as much as digits as its factorization.

2117719459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 46.

The square root of 2117719459 is about 46018.6859764596. The cubic root of 2117719459 is about 1284.1708548357.

The spelling of 2117719459 in words is "two billion, one hundred seventeen million, seven hundred nineteen thousand, four hundred fifty-nine".