623997 has 24 divisors (see below), whose sum is σ = 1021440. Its totient is φ = 376200.

The previous prime is 623989. The next prime is 624007. The reversal of 623997 is 799326.

623997 is nontrivially palindromic in base 15.

623997 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 623997 - 2³ = 623989 is a prime.

623997 is strictly pandigital in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623947) 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 23 ways as a sum of consecutive naturals, for example, 3172 + ... + 3362.

It is an arithmetic number, because the mean of its divisors is an integer number (42560).

2⁶²³⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

623997 is a deficient number, since it is larger than the sum of its proper divisors (397443).

623997 is a wasteful number, since it uses less digits than its factorization.

623997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 205 counting only the distinct ones).

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

The square root of 623997 is about 789.9348074367. The cubic root of 623997 is about 85.4530366896.

It can be divided in two parts, 6239 and 97, that added together give a palindrome (6336).

The spelling of 623997 in words is "six hundred twenty-three thousand, nine hundred ninety-seven".