84647 has 4 divisors (see below), whose sum is σ = 86496. Its totient is φ = 82800.

The previous prime is 84631. The next prime is 84649. The reversal of 84647 is 74648.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84647 - 2⁴ = 84631 is a prime.

It is a super-2 number, since 2×84647² = 14330229218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 84647.

It is not an unprimeable number, because it can be changed into a prime (84649) 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, 854 + ... + 947.

It is an arithmetic number, because the mean of its divisors is an integer number (21624).

2⁸⁴⁶⁴⁷ is an apocalyptic number.

84647 is a deficient number, since it is larger than the sum of its proper divisors (1849).

84647 is a wasteful number, since it uses less digits than its factorization.

84647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848.

The product of its digits is 5376, while the sum is 29.

The square root of 84647 is about 290.9415748909. The cubic root of 84647 is about 43.9073463525.

Subtracting from 84647 its reverse (74648), we obtain a palindrome (9999).

The spelling of 84647 in words is "eighty-four thousand, six hundred forty-seven".