84394823 has 4 divisors (see below), whose sum is σ = 85002120. Its totient is φ = 83787528.

The previous prime is 84394813. The next prime is 84394829. The reversal of 84394823 is 32849348.

It is a happy number.

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 84394823 - 2¹² = 84390727 is a prime.

It is a super-2 number, since 2×84394823² = 14244972298402658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84394829) 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, 303440 + ... + 303717.

It is an arithmetic number, because the mean of its divisors is an integer number (21250530).

Almost surely, 2^84394823 is an apocalyptic number.

84394823 is a deficient number, since it is larger than the sum of its proper divisors (607297).

84394823 is a wasteful number, since it uses less digits than its factorization.

84394823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607296.

The product of its digits is 165888, while the sum is 41.

The square root of 84394823 is about 9186.6654995161. The cubic root of 84394823 is about 438.6370063704.

The spelling of 84394823 in words is "eighty-four million, three hundred ninety-four thousand, eight hundred twenty-three".