8986831681 has 2 divisors, whose sum is σ = 8986831682. Its totient is φ = 8986831680.

The previous prime is 8986831661. The next prime is 8986831727. The reversal of 8986831681 is 1861386898.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8351035456 + 635796225 = 91384^2 + 25215^2 .

It is a cyclic number.

It is not a de Polignac number, because 8986831681 - 2¹⁵ = 8986798913 is a prime.

It is a super-2 number, since 2×8986831681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8986831661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4493415840 + 4493415841.

It is an arithmetic number, because the mean of its divisors is an integer number (4493415841).

Almost surely, 2^8986831681 is an apocalyptic number.

It is an amenable number.

8986831681 is a deficient number, since it is larger than the sum of its proper divisors (1).

8986831681 is an equidigital number, since it uses as much as digits as its factorization.

8986831681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3981312, while the sum is 58.

The square root of 8986831681 is about 94798.9012647299. The cubic root of 8986831681 is about 2079.0688387069.

The spelling of 8986831681 in words is "eight billion, nine hundred eighty-six million, eight hundred thirty-one thousand, six hundred eighty-one".