591325649 has 2 divisors, whose sum is σ = 591325650. Its totient is φ = 591325648.

The previous prime is 591325613. The next prime is 591325661. The reversal of 591325649 is 946523195.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 481495249 + 109830400 = 21943^2 + 10480^2 .

It is a cyclic number.

It is not a de Polignac number, because 591325649 - 2¹⁶ = 591260113 is a prime.

It is not a weakly prime, because it can be changed into another prime (591325249) 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, 295662824 + 295662825.

It is an arithmetic number, because the mean of its divisors is an integer number (295662825).

Almost surely, 2^591325649 is an apocalyptic number.

It is an amenable number.

591325649 is a deficient number, since it is larger than the sum of its proper divisors (1).

591325649 is an equidigital number, since it uses as much as digits as its factorization.

591325649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 291600, while the sum is 44.

The square root of 591325649 is about 24317.1883448724. The cubic root of 591325649 is about 839.3483461602.

The spelling of 591325649 in words is "five hundred ninety-one million, three hundred twenty-five thousand, six hundred forty-nine".