531688 has 16 divisors (see below), whose sum is σ = 1021860. Its totient is φ = 259200.

The previous prime is 531673. The next prime is 531689. The reversal of 531688 is 886135.

It can be written as a sum of positive squares in 2 ways, for example, as 521284 + 10404 = 722^2 + 102^2 .

It is not an unprimeable number, because it can be changed into a prime (531689) by changing a digit.

531688 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 483 + ... + 1138.

2⁵³¹⁶⁸⁸ is an apocalyptic number.

It is an amenable number.

531688 is a deficient number, since it is larger than the sum of its proper divisors (490172).

531688 is a wasteful number, since it uses less digits than its factorization.

531688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668 (or 1664 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

The square root of 531688 is about 729.1693904711. The cubic root of 531688 is about 81.0125469564.

The spelling of 531688 in words is "five hundred thirty-one thousand, six hundred eighty-eight".