623407 has 4 divisors (see below), whose sum is σ = 660096. Its totient is φ = 586720.

The previous prime is 623401. The next prime is 623417. The reversal of 623407 is 704326.

623407 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.

It is a cyclic number.

It is not a de Polignac number, because 623407 - 2⁷ = 623279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623401) 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, 18319 + ... + 18352.

It is an arithmetic number, because the mean of its divisors is an integer number (165024).

2⁶²³⁴⁰⁷ is an apocalyptic number.

623407 is a deficient number, since it is larger than the sum of its proper divisors (36689).

623407 is a wasteful number, since it uses less digits than its factorization.

623407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36688.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 623407 is about 789.5612705801. The cubic root of 623407 is about 85.4260957533.

The spelling of 623407 in words is "six hundred twenty-three thousand, four hundred seven".