530391 has 4 divisors (see below), whose sum is σ = 707192. Its totient is φ = 353592.

The previous prime is 530389. The next prime is 530393. The reversal of 530391 is 193035.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (530389) and next prime (530393).

It is not a de Polignac number, because 530391 - 2¹ = 530389 is a prime.

It is a super-2 number, since 2×530391² = 562629225762, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (530393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88396 + ... + 88401.

It is an arithmetic number, because the mean of its divisors is an integer number (176798).

2⁵³⁰³⁹¹ is an apocalyptic number.

530391 is a deficient number, since it is larger than the sum of its proper divisors (176801).

530391 is a wasteful number, since it uses less digits than its factorization.

530391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176800.

The product of its (nonzero) digits is 405, while the sum is 21.

The square root of 530391 is about 728.2794793210. The cubic root of 530391 is about 80.9466193021.

The spelling of 530391 in words is "five hundred thirty thousand, three hundred ninety-one".