623643 has 8 divisors (see below), whose sum is σ = 849408. Its totient is φ = 406824.

The previous prime is 623641. The next prime is 623653. The reversal of 623643 is 346326.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 623643 - 2¹ = 623641 is a prime.

It is a plaindrome in base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 623643.

It is not an unprimeable number, because it can be changed into a prime (623641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2071 + ... + 2352.

It is an arithmetic number, because the mean of its divisors is an integer number (106176).

2⁶²³⁶⁴³ is an apocalyptic number.

623643 is a deficient number, since it is larger than the sum of its proper divisors (225765).

623643 is a wasteful number, since it uses less digits than its factorization.

623643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4473.

The product of its digits is 2592, while the sum is 24.

The square root of 623643 is about 789.7107065249. The cubic root of 623643 is about 85.4368741667.

Adding to 623643 its reverse (346326), we get a palindrome (969969).

The spelling of 623643 in words is "six hundred twenty-three thousand, six hundred forty-three".