478739574839 has 2 divisors, whose sum is σ = 478739574840. Its totient is φ = 478739574838.

The previous prime is 478739574809. The next prime is 478739574881. The reversal of 478739574839 is 938475937874.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478739574839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478739574809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239369787419 + 239369787420.

It is an arithmetic number, because the mean of its divisors is an integer number (239369787420).

Almost surely, 2^478739574839 is an apocalyptic number.

478739574839 is a deficient number, since it is larger than the sum of its proper divisors (1).

478739574839 is an equidigital number, since it uses as much as digits as its factorization.

478739574839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1280240640, while the sum is 74.

The spelling of 478739574839 in words is "four hundred seventy-eight billion, seven hundred thirty-nine million, five hundred seventy-four thousand, eight hundred thirty-nine".