478816837 has 2 divisors, whose sum is σ = 478816838. Its totient is φ = 478816836.

The previous prime is 478816823. The next prime is 478816843. The reversal of 478816837 is 738618874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 456292321 + 22524516 = 21361^2 + 4746^2 .

It is a cyclic number.

It is not a de Polignac number, because 478816837 - 2¹⁵ = 478784069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478810837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239408418 + 239408419.

It is an arithmetic number, because the mean of its divisors is an integer number (239408419).

Almost surely, 2^478816837 is an apocalyptic number.

It is an amenable number.

478816837 is a deficient number, since it is larger than the sum of its proper divisors (1).

478816837 is an equidigital number, since it uses as much as digits as its factorization.

478816837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1806336, while the sum is 52.

The square root of 478816837 is about 21881.8837626014. The cubic root of 478816837 is about 782.3296757971.

The spelling of 478816837 in words is "four hundred seventy-eight million, eight hundred sixteen thousand, eight hundred thirty-seven".