479781 has 6 divisors (see below), whose sum is σ = 693030. Its totient is φ = 319848.

The previous prime is 479777. The next prime is 479783. The reversal of 479781 is 187974.

It can be written as a sum of positive squares in only one way, i.e., 370881 + 108900 = 609^2 + 330^2 .

It is not a de Polignac number, because 479781 - 2² = 479777 is a prime.

It is a super-2 number, since 2×479781² = 460379615922, which contains 22 as substring.

479781 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 479781.

It is not an unprimeable number, because it can be changed into a prime (479783) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26646 + ... + 26663.

It is an arithmetic number, because the mean of its divisors is an integer number (115505).

2⁴⁷⁹⁷⁸¹ is an apocalyptic number.

It is an amenable number.

479781 is a deficient number, since it is larger than the sum of its proper divisors (213249).

479781 is a wasteful number, since it uses less digits than its factorization.

479781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53315 (or 53312 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 479781 is about 692.6622553597. The cubic root of 479781 is about 78.2854432895.

The spelling of 479781 in words is "four hundred seventy-nine thousand, seven hundred eighty-one".