481591609 has 2 divisors, whose sum is σ = 481591610. Its totient is φ = 481591608.

The previous prime is 481591573. The next prime is 481591631. The reversal of 481591609 is 906195184.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 405901609 + 75690000 = 20147^2 + 8700^2 .

It is a cyclic number.

It is not a de Polignac number, because 481591609 - 2¹⁵ = 481558841 is a prime.

It is not a weakly prime, because it can be changed into another prime (481591009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 240795804 + 240795805.

It is an arithmetic number, because the mean of its divisors is an integer number (240795805).

Almost surely, 2^481591609 is an apocalyptic number.

It is an amenable number.

481591609 is a deficient number, since it is larger than the sum of its proper divisors (1).

481591609 is an equidigital number, since it uses as much as digits as its factorization.

481591609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 481591609 is about 21945.1955789872. The cubic root of 481591609 is about 783.8379816051.

The spelling of 481591609 in words is "four hundred eighty-one million, five hundred ninety-one thousand, six hundred nine".