84418459 has 4 divisors (see below), whose sum is σ = 85678504. Its totient is φ = 83158416.

The previous prime is 84418381. The next prime is 84418471. The reversal of 84418459 is 95481448.

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 84418459 - 2⁹ = 84417947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84418489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 629922 + ... + 630055.

It is an arithmetic number, because the mean of its divisors is an integer number (21419626).

Almost surely, 2^84418459 is an apocalyptic number.

84418459 is a deficient number, since it is larger than the sum of its proper divisors (1260045).

84418459 is a wasteful number, since it uses less digits than its factorization.

84418459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260044.

The product of its digits is 184320, while the sum is 43.

The square root of 84418459 is about 9187.9518392295. The cubic root of 84418459 is about 438.6779514434.

It can be divided in two parts, 8441 and 8459, that added together give a square (16900 = 130²).

The spelling of 84418459 in words is "eighty-four million, four hundred eighteen thousand, four hundred fifty-nine".