531000685 has 4 divisors (see below), whose sum is σ = 637200828. Its totient is φ = 424800544.

The previous prime is 531000683. The next prime is 531000713. The reversal of 531000685 is 586000135.

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 294671556 + 236329129 = 17166^2 + 15373^2 .

It is a cyclic number.

It is not a de Polignac number, because 531000685 - 2¹ = 531000683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531000683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53100064 + ... + 53100073.

It is an arithmetic number, because the mean of its divisors is an integer number (159300207).

Almost surely, 2^531000685 is an apocalyptic number.

It is an amenable number.

531000685 is a deficient number, since it is larger than the sum of its proper divisors (106200143).

531000685 is a wasteful number, since it uses less digits than its factorization.

531000685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106200142.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 531000685 is about 23043.4521068350. The cubic root of 531000685 is about 809.7762349943.

The spelling of 531000685 in words is "five hundred thirty-one million, six hundred eighty-five", and thus it is an aban number.