479991 has 8 divisors (see below), whose sum is σ = 644080. Its totient is φ = 317952.

The previous prime is 479971. The next prime is 480013. The reversal of 479991 is 199974.

479991 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 479991 - 2¹⁰ = 478967 is a prime.

It is a Duffinian number.

479991 is strictly pandigital in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (479951) 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 7 ways as a sum of consecutive naturals, for example, 165 + ... + 993.

It is an arithmetic number, because the mean of its divisors is an integer number (80510).

2⁴⁷⁹⁹⁹¹ is an apocalyptic number.

479991 is a deficient number, since it is larger than the sum of its proper divisors (164089).

479991 is a wasteful number, since it uses less digits than its factorization.

479991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025.

The product of its digits is 20412, while the sum is 39.

The square root of 479991 is about 692.8138278066. The cubic root of 479991 is about 78.2968634619.

The spelling of 479991 in words is "four hundred seventy-nine thousand, nine hundred ninety-one".