623799 has 12 divisors (see below), whose sum is σ = 983112. Its totient is φ = 378000.

The previous prime is 623771. The next prime is 623803. The reversal of 623799 is 997326.

623799 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 623799 - 2⁵ = 623767 is a prime.

It is a super-4 number, since 4×623799⁴ (a number of 24 digits) contains 4444 as substring.

623799 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623719) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3052 + ... + 3249.

It is an arithmetic number, because the mean of its divisors is an integer number (81926).

2⁶²³⁷⁹⁹ is an apocalyptic number.

623799 is a deficient number, since it is larger than the sum of its proper divisors (359313).

623799 is a wasteful number, since it uses less digits than its factorization.

623799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6318 (or 6315 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 623799 is about 789.8094706953. The cubic root of 623799 is about 85.4439973880.

It can be divided in two parts, 6237 and 99, that added together give a palindrome (6336).

The spelling of 623799 in words is "six hundred twenty-three thousand, seven hundred ninety-nine".