8899397281 has 2 divisors, whose sum is σ = 8899397282. Its totient is φ = 8899397280.

The previous prime is 8899397279. The next prime is 8899397317. The reversal of 8899397281 is 1827939988.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6999832225 + 1899565056 = 83665^2 + 43584^2 .

It is a cyclic number.

It is not a de Polignac number, because 8899397281 - 2¹ = 8899397279 is a prime.

It is a super-2 number, since 2×8899397281² (a number of 21 digits) contains 22 as substring.

Together with 8899397279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (8899397081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4449698640 + 4449698641.

It is an arithmetic number, because the mean of its divisors is an integer number (4449698641).

Almost surely, 2^8899397281 is an apocalyptic number.

It is an amenable number.

8899397281 is a deficient number, since it is larger than the sum of its proper divisors (1).

8899397281 is an equidigital number, since it uses as much as digits as its factorization.

8899397281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15676416, while the sum is 64.

The square root of 8899397281 is about 94336.6168621708. The cubic root of 8899397281 is about 2072.3043162773.

The spelling of 8899397281 in words is "eight billion, eight hundred ninety-nine million, three hundred ninety-seven thousand, two hundred eighty-one".