489775591 has 2 divisors, whose sum is σ = 489775592. Its totient is φ = 489775590.

The previous prime is 489775571. The next prime is 489775619. The reversal of 489775591 is 195577984.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-489775591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489775571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244887795 + 244887796.

It is an arithmetic number, because the mean of its divisors is an integer number (244887796).

Almost surely, 2^489775591 is an apocalyptic number.

489775591 is a deficient number, since it is larger than the sum of its proper divisors (1).

489775591 is an equidigital number, since it uses as much as digits as its factorization.

489775591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3175200, while the sum is 55.

The square root of 489775591 is about 22130.8741580625. The cubic root of 489775591 is about 788.2531454755.

The spelling of 489775591 in words is "four hundred eighty-nine million, seven hundred seventy-five thousand, five hundred ninety-one".