8987281 has 4 divisors (see below), whose sum is σ = 8993392. Its totient is φ = 8981172.

The previous prime is 8987269. The next prime is 8987287. The reversal of 8987281 is 1827898.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8987281 - 2¹⁵ = 8954513 is a prime.

It is a super-2 number, since 2×8987281² = 161542439545922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8987287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 646 + ... + 4288.

It is an arithmetic number, because the mean of its divisors is an integer number (2248348).

Almost surely, 2^8987281 is an apocalyptic number.

It is an amenable number.

8987281 is a deficient number, since it is larger than the sum of its proper divisors (6111).

8987281 is a wasteful number, since it uses less digits than its factorization.

8987281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6110.

The product of its digits is 64512, while the sum is 43.

The square root of 8987281 is about 2997.8794171881. The cubic root of 8987281 is about 207.9103487535.

The spelling of 8987281 in words is "eight million, nine hundred eighty-seven thousand, two hundred eighty-one".