8894807981 has 2 divisors, whose sum is σ = 8894807982. Its totient is φ = 8894807980.

The previous prime is 8894807939. The next prime is 8894808023. The reversal of 8894807981 is 1897084988.

It is a balanced prime because it is at equal distance from previous prime (8894807939) and next prime (8894808023).

It can be written as a sum of positive squares in only one way, i.e., 8884759081 + 10048900 = 94259^2 + 3170^2 .

It is a cyclic number.

It is not a de Polignac number, because 8894807981 - 2¹⁰ = 8894806957 is a prime.

It is a super-2 number, since 2×8894807981² (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 (8894807281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4447403990 + 4447403991.

It is an arithmetic number, because the mean of its divisors is an integer number (4447403991).

Almost surely, 2^8894807981 is an apocalyptic number.

It is an amenable number.

8894807981 is a deficient number, since it is larger than the sum of its proper divisors (1).

8894807981 is an equidigital number, since it uses as much as digits as its factorization.

8894807981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9289728, while the sum is 62.

The square root of 8894807981 is about 94312.2896604679. The cubic root of 8894807981 is about 2071.9480351657.

The spelling of 8894807981 in words is "eight billion, eight hundred ninety-four million, eight hundred seven thousand, nine hundred eighty-one".