479989 has 4 divisors (see below), whose sum is σ = 485856. Its totient is φ = 474124.

The previous prime is 479971. The next prime is 480013. The reversal of 479989 is 989974.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 989974 = 2 ⋅494987.

It is a cyclic number.

It is not a de Polignac number, because 479989 - 2⁵ = 479957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (479909) 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, 2809 + ... + 2974.

It is an arithmetic number, because the mean of its divisors is an integer number (121464).

2⁴⁷⁹⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

479989 is a deficient number, since it is larger than the sum of its proper divisors (5867).

479989 is an equidigital number, since it uses as much as digits as its factorization.

479989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5866.

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

The square root of 479989 is about 692.8123844159. The cubic root of 479989 is about 78.2967547140.

The spelling of 479989 in words is "four hundred seventy-nine thousand, nine hundred eighty-nine".