84424989 has 8 divisors (see below), whose sum is σ = 122800032. Its totient is φ = 51166640.

The previous prime is 84424981. The next prime is 84425051. The reversal of 84424989 is 98942448.

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 84424989 - 2³ = 84424981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84424981) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1279134 + ... + 1279199.

It is an arithmetic number, because the mean of its divisors is an integer number (15350004).

Almost surely, 2^84424989 is an apocalyptic number.

It is an amenable number.

84424989 is a deficient number, since it is larger than the sum of its proper divisors (38375043).

84424989 is a wasteful number, since it uses less digits than its factorization.

84424989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2558347.

The product of its digits is 663552, while the sum is 48.

The square root of 84424989 is about 9188.3071890311. The cubic root of 84424989 is about 438.6892621338.

It can be divided in two parts, 8442 and 4989, that added together give a palindrome (13431).

The spelling of 84424989 in words is "eighty-four million, four hundred twenty-four thousand, nine hundred eighty-nine".