84415 has 4 divisors (see below), whose sum is σ = 101304. Its totient is φ = 67528.

The previous prime is 84407. The next prime is 84421. The reversal of 84415 is 51448.

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 84415 - 2³ = 84407 is a prime.

It is a Duffinian number.

It is a plaindrome in base 8 and base 16.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8437 + ... + 8446.

It is an arithmetic number, because the mean of its divisors is an integer number (25326).

2⁸⁴⁴¹⁵ is an apocalyptic number.

84415 is a deficient number, since it is larger than the sum of its proper divisors (16889).

84415 is a wasteful number, since it uses less digits than its factorization.

84415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16888.

The product of its digits is 640, while the sum is 22.

The square root of 84415 is about 290.5425958444. The cubic root of 84415 is about 43.8671959832.

The spelling of 84415 in words is "eighty-four thousand, four hundred fifteen".