623873 has 4 divisors (see below), whose sum is σ = 629508. Its totient is φ = 618240.

The previous prime is 623869. The next prime is 623879. The reversal of 623873 is 378326.

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

It can be written as a sum of positive squares in 2 ways, for example, as 71824 + 552049 = 268^2 + 743^2 .

It is a cyclic number.

It is not a de Polignac number, because 623873 - 2² = 623869 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (623879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2648 + ... + 2873.

It is an arithmetic number, because the mean of its divisors is an integer number (157377).

2⁶²³⁸⁷³ is an apocalyptic number.

It is an amenable number.

623873 is a deficient number, since it is larger than the sum of its proper divisors (5635).

623873 is a wasteful number, since it uses less digits than its factorization.

623873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5634.

The product of its digits is 6048, while the sum is 29.

The square root of 623873 is about 789.8563160474. The cubic root of 623873 is about 85.4473759366.

The spelling of 623873 in words is "six hundred twenty-three thousand, eight hundred seventy-three".