531347489 has 2 divisors, whose sum is σ = 531347490. Its totient is φ = 531347488.

The previous prime is 531347459. The next prime is 531347497. The reversal of 531347489 is 984743135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 383846464 + 147501025 = 19592^2 + 12145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531347489 is a prime.

It is not a weakly prime, because it can be changed into another prime (531347459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265673744 + 265673745.

It is an arithmetic number, because the mean of its divisors is an integer number (265673745).

Almost surely, 2^531347489 is an apocalyptic number.

It is an amenable number.

531347489 is a deficient number, since it is larger than the sum of its proper divisors (1).

531347489 is an equidigital number, since it uses as much as digits as its factorization.

531347489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 44.

The square root of 531347489 is about 23050.9758795588. The cubic root of 531347489 is about 809.9524887034.

The spelling of 531347489 in words is "five hundred thirty-one million, three hundred forty-seven thousand, four hundred eighty-nine".