555623 has 4 divisors (see below), whose sum is σ = 559320. Its totient is φ = 551928.

The previous prime is 555593. The next prime is 555637. The reversal of 555623 is 326555.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-555623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 555592 and 555601.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 555623.

It is not an unprimeable number, because it can be changed into a prime (555683) 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 3 ways as a sum of consecutive naturals, for example, 1613 + ... + 1926.

It is an arithmetic number, because the mean of its divisors is an integer number (139830).

2⁵⁵⁵⁶²³ is an apocalyptic number.

555623 is a deficient number, since it is larger than the sum of its proper divisors (3697).

555623 is a wasteful number, since it uses less digits than its factorization.

555623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3696.

The product of its digits is 4500, while the sum is 26.

The square root of 555623 is about 745.4012342356. The cubic root of 555623 is about 82.2103956558.

The spelling of 555623 in words is "five hundred fifty-five thousand, six hundred twenty-three".