489979 has 4 divisors (see below), whose sum is σ = 559984. Its totient is φ = 419976.

The previous prime is 489977. The next prime is 489989. The reversal of 489979 is 979984.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 489979 - 2¹ = 489977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34992 + ... + 35005.

It is an arithmetic number, because the mean of its divisors is an integer number (139996).

2⁴⁸⁹⁹⁷⁹ is an apocalyptic number.

489979 is a deficient number, since it is larger than the sum of its proper divisors (70005).

489979 is an equidigital number, since it uses as much as digits as its factorization.

489979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70004.

The product of its digits is 163296, while the sum is 46.

The square root of 489979 is about 699.9849998393. The cubic root of 489979 is about 78.8362253671.

It can be divided in two parts, 489 and 979, that multiplied together give a triangular number (478731 = T₉₇₈).

The spelling of 489979 in words is "four hundred eighty-nine thousand, nine hundred seventy-nine".