489391983 has 16 divisors (see below), whose sum is σ = 738707040. Its totient is φ = 320104512.

The previous prime is 489391979. The next prime is 489392047. The reversal of 489391983 is 389193984.

It is not a de Polignac number, because 489391983 - 2² = 489391979 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489291983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169566 + ... + 172427.

It is an arithmetic number, because the mean of its divisors is an integer number (46169190).

Almost surely, 2^489391983 is an apocalyptic number.

489391983 is a deficient number, since it is larger than the sum of its proper divisors (249315057).

489391983 is a wasteful number, since it uses less digits than its factorization.

489391983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342055 (or 342049 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 54.

The square root of 489391983 is about 22122.2056540482. The cubic root of 489391983 is about 788.0472966492.

The spelling of 489391983 in words is "four hundred eighty-nine million, three hundred ninety-one thousand, nine hundred eighty-three".