8218172983 has 2 divisors, whose sum is σ = 8218172984. Its totient is φ = 8218172982.

The previous prime is 8218172981. The next prime is 8218173013. The reversal of 8218172983 is 3892718128.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8218172983 - 2¹ = 8218172981 is a prime.

It is a super-3 number, since 3×8218172983³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 8218172981, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8218172981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4109086491 + 4109086492.

It is an arithmetic number, because the mean of its divisors is an integer number (4109086492).

Almost surely, 2^8218172983 is an apocalyptic number.

8218172983 is a deficient number, since it is larger than the sum of its proper divisors (1).

8218172983 is an equidigital number, since it uses as much as digits as its factorization.

8218172983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 49.

The square root of 8218172983 is about 90654.1393594358. The cubic root of 8218172983 is about 2018.0182654900.

The spelling of 8218172983 in words is "eight billion, two hundred eighteen million, one hundred seventy-two thousand, nine hundred eighty-three".