489947679 has 48 divisors (see below), whose sum is σ = 803904192. Its totient is φ = 285272064.

The previous prime is 489947671. The next prime is 489947681. The reversal of 489947679 is 976749984.

489947679 is a `hidden beast` number, since 4 + 8 + 99 + 476 + 79 = 666.

It is not a de Polignac number, because 489947679 - 2³ = 489947671 is a prime.

Its product of digits (27433728) is a multiple of the sum of its prime factors (2016).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489947671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 260089 + ... + 261965.

It is an arithmetic number, because the mean of its divisors is an integer number (16748004).

Almost surely, 2^489947679 is an apocalyptic number.

489947679 is a deficient number, since it is larger than the sum of its proper divisors (313956513).

489947679 is a wasteful number, since it uses less digits than its factorization.

489947679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2016 (or 2013 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 63.

The square root of 489947679 is about 22134.7617787046. The cubic root of 489947679 is about 788.3454551139.

The spelling of 489947679 in words is "four hundred eighty-nine million, nine hundred forty-seven thousand, six hundred seventy-nine".