623311 has 4 divisors (see below), whose sum is σ = 671272. Its totient is φ = 575352.

The previous prime is 623303. The next prime is 623321. The reversal of 623311 is 113326.

623311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113326 = 2 ⋅56663.

It is a cyclic number.

It is not a de Polignac number, because 623311 - 2³ = 623303 is a prime.

It is the 790-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623321) by changing a digit.

It is a nontrivial repunit in base 789.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23961 + ... + 23986.

It is an arithmetic number, because the mean of its divisors is an integer number (167818).

2⁶²³³¹¹ is an apocalyptic number.

623311 is a deficient number, since it is larger than the sum of its proper divisors (47961).

623311 is a wasteful number, since it uses less digits than its factorization.

623311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47960.

The product of its digits is 108, while the sum is 16.

The square root of 623311 is about 789.5004749840. The cubic root of 623311 is about 85.4217105357.

Adding to 623311 its reverse (113326), we get a palindrome (736637).

It can be divided in two parts, 623 and 311, that multiplied together give a triangular number (193753 = T₆₂₂).

The spelling of 623311 in words is "six hundred twenty-three thousand, three hundred eleven".