84664423 has 4 divisors (see below), whose sum is σ = 85331200. Its totient is φ = 83997648.

The previous prime is 84664421. The next prime is 84664429. The reversal of 84664423 is 32446648.

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 84664423 - 2¹ = 84664421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84664421) 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, 333198 + ... + 333451.

It is an arithmetic number, because the mean of its divisors is an integer number (21332800).

Almost surely, 2^84664423 is an apocalyptic number.

84664423 is a deficient number, since it is larger than the sum of its proper divisors (666777).

84664423 is a wasteful number, since it uses less digits than its factorization.

84664423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666776.

The product of its digits is 110592, while the sum is 37.

The square root of 84664423 is about 9201.3272412191. The cubic root of 84664423 is about 439.1035864752.

The spelling of 84664423 in words is "eighty-four million, six hundred sixty-four thousand, four hundred twenty-three".