478739 has 2 divisors, whose sum is σ = 478740. Its totient is φ = 478738.

The previous prime is 478729. The next prime is 478741. The reversal of 478739 is 937874.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 478739 - 2⁸ = 478483 is a prime.

Together with 478741, it forms a pair of twin primes.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 478739.

It is not a weakly prime, because it can be changed into another prime (478729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239369 + 239370.

It is an arithmetic number, because the mean of its divisors is an integer number (239370).

2⁴⁷⁸⁷³⁹ is an apocalyptic number.

478739 is a deficient number, since it is larger than the sum of its proper divisors (1).

478739 is an equidigital number, since it uses as much as digits as its factorization.

478739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 38.

The square root of 478739 is about 691.9096761861. The cubic root of 478739 is about 78.2287281371.

The spelling of 478739 in words is "four hundred seventy-eight thousand, seven hundred thirty-nine".