489681539 has 2 divisors, whose sum is σ = 489681540. Its totient is φ = 489681538.

The previous prime is 489681473. The next prime is 489681589. The reversal of 489681539 is 935186984.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 489681539 - 2¹⁶ = 489616003 is a prime.

It is not a weakly prime, because it can be changed into another prime (489681589) 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, 244840769 + 244840770.

It is an arithmetic number, because the mean of its divisors is an integer number (244840770).

Almost surely, 2^489681539 is an apocalyptic number.

489681539 is a deficient number, since it is larger than the sum of its proper divisors (1).

489681539 is an equidigital number, since it uses as much as digits as its factorization.

489681539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 53.

The square root of 489681539 is about 22128.7491512738. The cubic root of 489681539 is about 788.2026859506.

The spelling of 489681539 in words is "four hundred eighty-nine million, six hundred eighty-one thousand, five hundred thirty-nine".