531346549 has 2 divisors, whose sum is σ = 531346550. Its totient is φ = 531346548.

The previous prime is 531346547. The next prime is 531346573. The reversal of 531346549 is 945643135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 429235524 + 102111025 = 20718^2 + 10105^2 .

It is a cyclic number.

It is not a de Polignac number, because 531346549 - 2¹ = 531346547 is a prime.

Together with 531346547, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531346547) 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 as a sum of consecutive naturals, namely, 265673274 + 265673275.

It is an arithmetic number, because the mean of its divisors is an integer number (265673275).

Almost surely, 2^531346549 is an apocalyptic number.

It is an amenable number.

531346549 is a deficient number, since it is larger than the sum of its proper divisors (1).

531346549 is an equidigital number, since it uses as much as digits as its factorization.

531346549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 40.

The square root of 531346549 is about 23050.9554899575. The cubic root of 531346549 is about 809.9520110776.

The spelling of 531346549 in words is "five hundred thirty-one million, three hundred forty-six thousand, five hundred forty-nine".