489656979 has 12 divisors (see below), whose sum is σ = 808322736. Its totient is φ = 279803952.

The previous prime is 489656969. The next prime is 489657023. The reversal of 489656979 is 979656984.

It is a happy number.

489656979 is a `hidden beast` number, since 489 + 65 + 6 + 97 + 9 = 666.

It is not a de Polignac number, because 489656979 - 2¹² = 489652883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 7772333 = 489656979 / (4 + 8 + 9 + 6 + 5 + 6 + 9 + 7 + 9).

It is not an unprimeable number, because it can be changed into a prime (489656929) 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, 3886104 + ... + 3886229.

It is an arithmetic number, because the mean of its divisors is an integer number (67360228).

Almost surely, 2^489656979 is an apocalyptic number.

489656979 is a deficient number, since it is larger than the sum of its proper divisors (318665757).

489656979 is a wasteful number, since it uses less digits than its factorization.

489656979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7772346 (or 7772343 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 63.

The square root of 489656979 is about 22128.1942101022. The cubic root of 489656979 is about 788.1895082831.

The spelling of 489656979 in words is "four hundred eighty-nine million, six hundred fifty-six thousand, nine hundred seventy-nine".