623000509 has 4 divisors (see below), whose sum is σ = 628716220. Its totient is φ = 617284800.

The previous prime is 623000491. The next prime is 623000537. The reversal of 623000509 is 905000326.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 905000326 = 2 ⋅452500163.

It can be written as a sum of positive squares in 2 ways, for example, as 527391225 + 95609284 = 22965^2 + 9778^2 .

It is a cyclic number.

It is not a de Polignac number, because 623000509 - 2⁹ = 622999997 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 (623000549) 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, 2857692 + ... + 2857909.

It is an arithmetic number, because the mean of its divisors is an integer number (157179055).

Almost surely, 2^623000509 is an apocalyptic number.

It is an amenable number.

623000509 is a deficient number, since it is larger than the sum of its proper divisors (5715711).

623000509 is a wasteful number, since it uses less digits than its factorization.

623000509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5715710.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 623000509 is about 24959.9781450225. The cubic root of 623000509 is about 854.0752442445.

The spelling of 623000509 in words is "six hundred twenty-three million, five hundred nine", and thus it is an aban number.