2100717917 has 2 divisors, whose sum is σ = 2100717918. Its totient is φ = 2100717916.

The previous prime is 2100717877. The next prime is 2100717929. The reversal of 2100717917 is 7197170012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1704946681 + 395771236 = 41291^2 + 19894^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100717917 - 2²² = 2096523613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2100717937) 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, 1050358958 + 1050358959.

It is an arithmetic number, because the mean of its divisors is an integer number (1050358959).

Almost surely, 2^2100717917 is an apocalyptic number.

It is an amenable number.

2100717917 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100717917 is an equidigital number, since it uses as much as digits as its factorization.

2100717917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6174, while the sum is 35.

The square root of 2100717917 is about 45833.5893968605. The cubic root of 2100717917 is about 1280.7250768617.

Adding to 2100717917 its reverse (7197170012), we get a palindrome (9297887929).

The spelling of 2100717917 in words is "two billion, one hundred million, seven hundred seventeen thousand, nine hundred seventeen".