84427 has 6 divisors (see below), whose sum is σ = 98268. Its totient is φ = 72324.

The previous prime is 84421. The next prime is 84431. The reversal of 84427 is 72448.

It is not a de Polignac number, because 84427 - 2⁷ = 84299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 813 + ... + 910.

It is an arithmetic number, because the mean of its divisors is an integer number (16378).

2⁸⁴⁴²⁷ is an apocalyptic number.

84427 is a deficient number, since it is larger than the sum of its proper divisors (13841).

84427 is a wasteful number, since it uses less digits than its factorization.

84427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1737 (or 1730 counting only the distinct ones).

The product of its digits is 1792, while the sum is 25.

The square root of 84427 is about 290.5632461272. The cubic root of 84427 is about 43.8692745293.

The spelling of 84427 in words is "eighty-four thousand, four hundred twenty-seven".