620823 has 32 divisors (see below), whose sum is σ = 1050624. Its totient is φ = 317952.

The previous prime is 620821. The next prime is 620827. The reversal of 620823 is 328026.

It is not a de Polignac number, because 620823 - 2¹ = 620821 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

620823 is a lucky number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 620823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620821) 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 31 ways as a sum of consecutive naturals, for example, 13186 + ... + 13232.

It is an arithmetic number, because the mean of its divisors is an integer number (32832).

2⁶²⁰⁸²³ is an apocalyptic number.

620823 is a deficient number, since it is larger than the sum of its proper divisors (429801).

620823 is a wasteful number, since it uses less digits than its factorization.

620823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 620823 is about 787.9232196096. The cubic root of 620823 is about 85.3079029175.

Adding to 620823 its reverse (328026), we get a palindrome (948849).

The spelling of 620823 in words is "six hundred twenty thousand, eight hundred twenty-three".