489561959 has 2 divisors, whose sum is σ = 489561960. Its totient is φ = 489561958.

The previous prime is 489561949. The next prime is 489562019. The reversal of 489561959 is 959165984.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 489561959 - 2¹² = 489557863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489561929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244780979 + 244780980.

It is an arithmetic number, because the mean of its divisors is an integer number (244780980).

Almost surely, 2^489561959 is an apocalyptic number.

489561959 is a deficient number, since it is larger than the sum of its proper divisors (1).

489561959 is an equidigital number, since it uses as much as digits as its factorization.

489561959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3499200, while the sum is 56.

The square root of 489561959 is about 22126.0470712687. The cubic root of 489561959 is about 788.1385211531.

The spelling of 489561959 in words is "four hundred eighty-nine million, five hundred sixty-one thousand, nine hundred fifty-nine".