2117719481 has 2 divisors, whose sum is σ = 2117719482. Its totient is φ = 2117719480.

The previous prime is 2117719459. The next prime is 2117719517. The reversal of 2117719481 is 1849177112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2041593856 + 76125625 = 45184^2 + 8725^2 .

It is a cyclic number.

It is not a de Polignac number, because 2117719481 - 2¹⁴ = 2117703097 is a prime.

It is a super-2 number, since 2×2117719481² = 8969471600413818722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2117719421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058859740 + 1058859741.

It is an arithmetic number, because the mean of its divisors is an integer number (1058859741).

Almost surely, 2^2117719481 is an apocalyptic number.

It is an amenable number.

2117719481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2117719481 is an equidigital number, since it uses as much as digits as its factorization.

2117719481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 41.

The square root of 2117719481 is about 46018.6862154929. The cubic root of 2117719481 is about 1284.1708592825.

The spelling of 2117719481 in words is "two billion, one hundred seventeen million, seven hundred nineteen thousand, four hundred eighty-one".