531493 has 4 divisors (see below), whose sum is σ = 540268. Its totient is φ = 522720.

The previous prime is 531481. The next prime is 531497. The reversal of 531493 is 394135.

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

It can be written as a sum of positive squares in 2 ways, for example, as 268324 + 263169 = 518^2 + 513^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531493 is a prime.

It is a d-powerful number, because it can be written as 5 + 3 + 4² + 1 + 9⁶ + 3³ .

It is a Duffinian number.

531493 is a lucky number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4296 + ... + 4417.

It is an arithmetic number, because the mean of its divisors is an integer number (135067).

531493 is a Friedman number, since it can be written as 53+(9*3)^4-1, using all its digits and the basic arithmetic operations.

2⁵³¹⁴⁹³ is an apocalyptic number.

It is an amenable number.

531493 is a deficient number, since it is larger than the sum of its proper divisors (8775).

531493 is an equidigital number, since it uses as much as digits as its factorization.

531493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8774.

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

The square root of 531493 is about 729.0356644225. The cubic root of 531493 is about 81.0026417875.

It can be divided in two parts, 531 and 493, that added together give a 10-th power (1024 = 2¹⁰).

The spelling of 531493 in words is "five hundred thirty-one thousand, four hundred ninety-three".