489580991 has 2 divisors, whose sum is σ = 489580992. Its totient is φ = 489580990.

The previous prime is 489580957. The next prime is 489581023. The reversal of 489580991 is 199085984.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-489580991 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489580951) 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, 244790495 + 244790496.

It is an arithmetic number, because the mean of its divisors is an integer number (244790496).

Almost surely, 2^489580991 is an apocalyptic number.

489580991 is a deficient number, since it is larger than the sum of its proper divisors (1).

489580991 is an equidigital number, since it uses as much as digits as its factorization.

489580991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 933120, while the sum is 53.

The square root of 489580991 is about 22126.4771484301. The cubic root of 489580991 is about 788.1487341321.

The spelling of 489580991 in words is "four hundred eighty-nine million, five hundred eighty thousand, nine hundred ninety-one".