8420823 has 12 divisors (see below), whose sum is σ = 12193480. Its totient is φ = 5600016.

The previous prime is 8420821. The next prime is 8420827. The reversal of 8420823 is 3280248.

It is not a de Polignac number, because 8420823 - 2¹ = 8420821 is a prime.

It is a Duffinian number.

8420823 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8420821) 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 11 ways as a sum of consecutive naturals, for example, 3813 + ... + 5601.

Almost surely, 2^8420823 is an apocalyptic number.

8420823 is a deficient number, since it is larger than the sum of its proper divisors (3772657).

8420823 is a wasteful number, since it uses less digits than its factorization.

8420823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318 (or 2315 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 8420823 is about 2901.8654345093. The cubic root of 8420823 is about 203.4471043552.

The spelling of 8420823 in words is "eight million, four hundred twenty thousand, eight hundred twenty-three".