87281447 has 8 divisors (see below), whose sum is σ = 95802240. Its totient is φ = 78858360.

The previous prime is 87281419. The next prime is 87281521. The reversal of 87281447 is 74418278.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87281447 - 2⁸ = 87281191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87281147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22547 + ... + 26132.

It is an arithmetic number, because the mean of its divisors is an integer number (11975280).

Almost surely, 2^87281447 is an apocalyptic number.

87281447 is a deficient number, since it is larger than the sum of its proper divisors (8520793).

87281447 is a wasteful number, since it uses less digits than its factorization.

87281447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48853.

The product of its digits is 100352, while the sum is 41.

The square root of 87281447 is about 9342.4540138017. The cubic root of 87281447 is about 443.5820658733.

The spelling of 87281447 in words is "eighty-seven million, two hundred eighty-one thousand, four hundred forty-seven".