489512891 has 12 divisors (see below), whose sum is σ = 570981312. Its totient is φ = 418441968.

The previous prime is 489512873. The next prime is 489512893. The reversal of 489512891 is 198215984.

It is not a de Polignac number, because 489512891 - 2²⁶ = 422404027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489512893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4886 + ... + 31668.

It is an arithmetic number, because the mean of its divisors is an integer number (47581776).

Almost surely, 2^489512891 is an apocalyptic number.

489512891 is a deficient number, since it is larger than the sum of its proper divisors (81468421).

489512891 is a wasteful number, since it uses less digits than its factorization.

489512891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27170 (or 27163 counting only the distinct ones).

The product of its digits is 207360, while the sum is 47.

The square root of 489512891 is about 22124.9382146030. The cubic root of 489512891 is about 788.1121889920.

The spelling of 489512891 in words is "four hundred eighty-nine million, five hundred twelve thousand, eight hundred ninety-one".