68623 has 4 divisors (see below), whose sum is σ = 69208. Its totient is φ = 68040.

The previous prime is 68611. The next prime is 68633. The reversal of 68623 is 32686.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 68623 - 2⁹ = 68111 is a prime.

It is a super-2 number, since 2×68623² = 9418232258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68633) 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 3 ways as a sum of consecutive naturals, for example, 48 + ... + 373.

It is an arithmetic number, because the mean of its divisors is an integer number (17302).

2⁶⁸⁶²³ is an apocalyptic number.

68623 is a deficient number, since it is larger than the sum of its proper divisors (585).

68623 is a wasteful number, since it uses less digits than its factorization.

68623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584.

The product of its digits is 1728, while the sum is 25.

The square root of 68623 is about 261.9599205986. The cubic root of 68623 is about 40.9408228175.

Subtracting from 68623 its reverse (32686), we obtain a cube (35937 = 33³).

The spelling of 68623 in words is "sixty-eight thousand, six hundred twenty-three".