8517296981 has 2 divisors, whose sum is σ = 8517296982. Its totient is φ = 8517296980.

The previous prime is 8517296869. The next prime is 8517297077. The reversal of 8517296981 is 1896927158.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8324920081 + 192376900 = 91241^2 + 13870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8517296981 is a prime.

It is a super-2 number, since 2×8517296981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8517299981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4258648490 + 4258648491.

It is an arithmetic number, because the mean of its divisors is an integer number (4258648491).

Almost surely, 2^8517296981 is an apocalyptic number.

It is an amenable number.

8517296981 is a deficient number, since it is larger than the sum of its proper divisors (1).

8517296981 is an equidigital number, since it uses as much as digits as its factorization.

8517296981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 56.

The square root of 8517296981 is about 92289.2029492074. The cubic root of 8517296981 is about 2042.2109328353.

The spelling of 8517296981 in words is "eight billion, five hundred seventeen million, two hundred ninety-six thousand, nine hundred eighty-one".