531330689 has 2 divisors, whose sum is σ = 531330690. Its totient is φ = 531330688.

The previous prime is 531330647. The next prime is 531330691. The reversal of 531330689 is 986033135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 375080689 + 156250000 = 19367^2 + 12500^2 .

It is a cyclic number.

It is not a de Polignac number, because 531330689 - 2¹⁶ = 531265153 is a prime.

Together with 531330691, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_27916904 and since 531330689 and 27916904 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (531330389) by changing a digit.

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 as a sum of consecutive naturals, namely, 265665344 + 265665345.

It is an arithmetic number, because the mean of its divisors is an integer number (265665345).

Almost surely, 2^531330689 is an apocalyptic number.

It is an amenable number.

531330689 is a deficient number, since it is larger than the sum of its proper divisors (1).

531330689 is an equidigital number, since it uses as much as digits as its factorization.

531330689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 531330689 is about 23050.6114669438. The cubic root of 531330689 is about 809.9439523278.

The spelling of 531330689 in words is "five hundred thirty-one million, three hundred thirty thousand, six hundred eighty-nine".