478981 has 4 divisors (see below), whose sum is σ = 494464. Its totient is φ = 463500.

The previous prime is 478967. The next prime is 478991. The reversal of 478981 is 189874.

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.

It is a cyclic number.

It is not a de Polignac number, because 478981 - 2⁷ = 478853 is a prime.

It is a super-2 number, since 2×478981² = 458845596722, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 478981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478901) 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, 7695 + ... + 7756.

It is an arithmetic number, because the mean of its divisors is an integer number (123616).

2⁴⁷⁸⁹⁸¹ is an apocalyptic number.

It is an amenable number.

478981 is a deficient number, since it is larger than the sum of its proper divisors (15483).

478981 is a wasteful number, since it uses less digits than its factorization.

478981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15482.

The product of its digits is 16128, while the sum is 37.

The square root of 478981 is about 692.0845324092. The cubic root of 478981 is about 78.2419073177.

The spelling of 478981 in words is "four hundred seventy-eight thousand, nine hundred eighty-one".