531297689 has 16 divisors (see below), whose sum is σ = 589160208. Its totient is φ = 475932672.

The previous prime is 531297671. The next prime is 531297737. The reversal of 531297689 is 986792135.

It can be written as a sum of positive squares in 8 ways, for example, as 144192064 + 387105625 = 12008^2 + 19675^2 .

It is a cyclic number.

It is not a de Polignac number, because 531297689 - 2⁸ = 531297433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (531297619) 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 15 ways as a sum of consecutive naturals, for example, 218609 + ... + 221025.

It is an arithmetic number, because the mean of its divisors is an integer number (36822513).

Almost surely, 2^531297689 is an apocalyptic number.

It is an amenable number.

531297689 is a deficient number, since it is larger than the sum of its proper divisors (57862519).

531297689 is a wasteful number, since it uses less digits than its factorization.

531297689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2924.

The product of its digits is 816480, while the sum is 50.

The square root of 531297689 is about 23049.8956396770. The cubic root of 531297689 is about 809.9271839232.

The spelling of 531297689 in words is "five hundred thirty-one million, two hundred ninety-seven thousand, six hundred eighty-nine".