8317097981 has 16 divisors (see below), whose sum is σ = 8999087040. Its totient is φ = 7662170880.

The previous prime is 8317097953. The next prime is 8317098043. The reversal of 8317097981 is 1897907138.

It is a cyclic number.

It is not a de Polignac number, because 8317097981 - 2³⁰ = 7243356157 is a prime.

It is a super-2 number, since 2×8317097981² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8317099981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77246 + ... + 150336.

It is an arithmetic number, because the mean of its divisors is an integer number (562442940).

Almost surely, 2^8317097981 is an apocalyptic number.

It is an amenable number.

8317097981 is a deficient number, since it is larger than the sum of its proper divisors (681989059).

8317097981 is a wasteful number, since it uses less digits than its factorization.

8317097981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73276.

The product of its (nonzero) digits is 762048, while the sum is 53.

The square root of 8317097981 is about 91198.1248765565. The cubic root of 8317097981 is about 2026.0831866664.

The spelling of 8317097981 in words is "eight billion, three hundred seventeen million, ninety-seven thousand, nine hundred eighty-one".