605623 has 4 divisors (see below), whose sum is σ = 610120. Its totient is φ = 601128.

The previous prime is 605617. The next prime is 605629. The reversal of 605623 is 326506.

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

It is an interprime number because it is at equal distance from previous prime (605617) and next prime (605629).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-605623 is a prime.

It is an Ulam number.

It is a Duffinian number.

605623 is a lucky number.

It is a plaindrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 605594 and 605603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (605629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2040 + ... + 2317.

It is an arithmetic number, because the mean of its divisors is an integer number (152530).

2⁶⁰⁵⁶²³ is an apocalyptic number.

605623 is a deficient number, since it is larger than the sum of its proper divisors (4497).

605623 is a wasteful number, since it uses less digits than its factorization.

605623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4496.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 605623 is about 778.2178358275. The cubic root of 605623 is about 84.6059267030.

The spelling of 605623 in words is "six hundred five thousand, six hundred twenty-three".