477981 has 24 divisors (see below), whose sum is σ = 821184. Its totient is φ = 272160.

The previous prime is 477977. The next prime is 477991. The reversal of 477981 is 189774.

It is not a de Polignac number, because 477981 - 2² = 477977 is a prime.

It is a super-2 number, since 2×477981² = 456931672722, which contains 22 as substring.

It is a Curzon 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 477981.

It is not an unprimeable number, because it can be changed into a prime (477941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1561 + ... + 1841.

It is an arithmetic number, because the mean of its divisors is an integer number (34216).

2⁴⁷⁷⁹⁸¹ is an apocalyptic number.

It is an amenable number.

477981 is a deficient number, since it is larger than the sum of its proper divisors (343203).

477981 is an equidigital number, since it uses as much as digits as its factorization.

477981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303 (or 291 counting only the distinct ones).

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

The square root of 477981 is about 691.3616998359. The cubic root of 477981 is about 78.1874191294.

The spelling of 477981 in words is "four hundred seventy-seven thousand, nine hundred eighty-one".