506645129 has 4 divisors (see below), whose sum is σ = 506857680. Its totient is φ = 506432580.

The previous prime is 506645119. The next prime is 506645141. The reversal of 506645129 is 921546605.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-506645129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 506645092 and 506645101.

It is not an unprimeable number, because it can be changed into a prime (506645119) 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, 102659 + ... + 107480.

It is an arithmetic number, because the mean of its divisors is an integer number (126714420).

Almost surely, 2^506645129 is an apocalyptic number.

It is an amenable number.

506645129 is a deficient number, since it is larger than the sum of its proper divisors (212551).

506645129 is a wasteful number, since it uses less digits than its factorization.

506645129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212550.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 506645129 is about 22508.7789317857. The cubic root of 506645129 is about 797.2012246767.

The spelling of 506645129 in words is "five hundred six million, six hundred forty-five thousand, one hundred twenty-nine".