531728017 has 4 divisors (see below), whose sum is σ = 539217216. Its totient is φ = 524238820.

The previous prime is 531728011. The next prime is 531728059. The reversal of 531728017 is 710827135.

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, and also an emirpimes, since its reverse is a distinct semiprime: 710827135 = 5 ⋅142165427.

It is a cyclic number.

It is not a de Polignac number, because 531728017 - 2³ = 531728009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531728011) 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, 3744493 + ... + 3744634.

It is an arithmetic number, because the mean of its divisors is an integer number (134804304).

Almost surely, 2^531728017 is an apocalyptic number.

It is an amenable number.

531728017 is a deficient number, since it is larger than the sum of its proper divisors (7489199).

531728017 is an equidigital number, since it uses as much as digits as its factorization.

531728017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7489198.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 531728017 is about 23059.2284563036. The cubic root of 531728017 is about 810.1457934997.

The spelling of 531728017 in words is "five hundred thirty-one million, seven hundred twenty-eight thousand, seventeen".