623606 has 4 divisors (see below), whose sum is σ = 935412. Its totient is φ = 311802.

The previous prime is 623591. The next prime is 623617. The reversal of 623606 is 606326.

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

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 155900 + ... + 155903.

It is an arithmetic number, because the mean of its divisors is an integer number (233853).

2⁶²³⁶⁰⁶ is an apocalyptic number.

623606 is a deficient number, since it is larger than the sum of its proper divisors (311806).

623606 is a wasteful number, since it uses less digits than its factorization.

623606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311805.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 623606 is about 789.6872798773. The cubic root of 623606 is about 85.4351845105.

The spelling of 623606 in words is "six hundred twenty-three thousand, six hundred six".