8447264281 has 3 divisors (see below), whose sum is σ = 8447356191. Its totient is φ = 8447172372.

The previous prime is 8447264261. The next prime is 8447264299. The reversal of 8447264281 is 1824627448.

The square root of 8447264281 is 91909.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 8410540681 + 36723600 = 91709^2 + 6060^2 .

It is not a de Polignac number, because 8447264281 - 2¹⁷ = 8447133209 is a prime.

It is a super-2 number, since 2×8447264281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8447264261) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 45955 + ... + 137863.

It is an arithmetic number, because the mean of its divisors is an integer number (2815785397).

Almost surely, 2^8447264281 is an apocalyptic number.

8447264281 is the 91909-th square number.

8447264281 is the 45955-th centered octagonal number.

It is an amenable number.

8447264281 is a deficient number, since it is larger than the sum of its proper divisors (91910).

8447264281 is an frugal number, since it uses more digits than its factorization.

8447264281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183818 (or 91909 counting only the distinct ones).

The product of its digits is 688128, while the sum is 46.

The cubic root of 8447264281 is about 2036.5982233765.

The spelling of 8447264281 in words is "eight billion, four hundred forty-seven million, two hundred sixty-four thousand, two hundred eighty-one".