531720764 has 12 divisors (see below), whose sum is σ = 985247424. Its totient is φ = 250221504.

The previous prime is 531720737. The next prime is 531720809. The reversal of 531720764 is 467027135.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3909644 + ... + 3909779.

It is an arithmetic number, because the mean of its divisors is an integer number (82103952).

Almost surely, 2^531720764 is an apocalyptic number.

It is an amenable number.

531720764 is a deficient number, since it is larger than the sum of its proper divisors (453526660).

531720764 is a wasteful number, since it uses less digits than its factorization.

531720764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7819444 (or 7819442 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 531720764 is about 23059.0711868453. The cubic root of 531720764 is about 810.1421099033.

Adding to 531720764 its reverse (467027135), we get a palindrome (998747899).

The spelling of 531720764 in words is "five hundred thirty-one million, seven hundred twenty thousand, seven hundred sixty-four".