506123409 has 8 divisors (see below), whose sum is σ = 736179552. Its totient is φ = 306741440.

The previous prime is 506123351. The next prime is 506123411. The reversal of 506123409 is 904321605.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 506123409 - 2¹⁶ = 506057873 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (506123479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7668504 + ... + 7668569.

It is an arithmetic number, because the mean of its divisors is an integer number (92022444).

Almost surely, 2^506123409 is an apocalyptic number.

It is an amenable number.

506123409 is a deficient number, since it is larger than the sum of its proper divisors (230056143).

506123409 is a wasteful number, since it uses less digits than its factorization.

506123409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15337087.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 506123409 is about 22497.1866907843. The cubic root of 506123409 is about 796.9274902325.

The spelling of 506123409 in words is "five hundred six million, one hundred twenty-three thousand, four hundred nine".