623623 has 24 divisors (see below), whose sum is σ = 861840. Its totient is φ = 443520.

The previous prime is 623621. The next prime is 623633. The reversal of 623623 is 326326.

It is not a de Polignac number, because 623623 - 2¹ = 623621 is a prime.

It is a super-2 number, since 2×623623² = 777811292258, which contains 22 as substring.

623623 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 623594 and 623603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6963 + ... + 7051.

It is an arithmetic number, because the mean of its divisors is an integer number (35910).

2⁶²³⁶²³ is an apocalyptic number.

623623 is a deficient number, since it is larger than the sum of its proper divisors (238217).

623623 is a wasteful number, since it uses less digits than its factorization.

623623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127 (or 120 counting only the distinct ones).

The product of its digits is 1296, while the sum is 22.

The square root of 623623 is about 789.6980435584. The cubic root of 623623 is about 85.4359608473.

Adding to 623623 its reverse (326326), we get a palindrome (949949).

The spelling of 623623 in words is "six hundred twenty-three thousand, six hundred twenty-three".