478999 has 2 divisors, whose sum is σ = 479000. Its totient is φ = 478998.

The previous prime is 478991. The next prime is 479023. The reversal of 478999 is 999874.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 478999 - 2³ = 478991 is a prime.

It is a Chen prime.

It is an Ulam number.

478999 is a modest number, since divided by 999 gives 478 as remainder.

478999 is a lucky number.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239499 + 239500.

It is an arithmetic number, because the mean of its divisors is an integer number (239500).

2⁴⁷⁸⁹⁹⁹ is an apocalyptic number.

478999 is a deficient number, since it is larger than the sum of its proper divisors (1).

478999 is an equidigital number, since it uses as much as digits as its factorization.

478999 is an evil number, because the sum of its binary digits is even.

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

The square root of 478999 is about 692.0975364788. The cubic root of 478999 is about 78.2428874099.

It can be divided in two parts, 4 and 78999, that added together give a triangular number (79003 = T₃₉₇).

The spelling of 478999 in words is "four hundred seventy-eight thousand, nine hundred ninety-nine".