478492813 has 2 divisors, whose sum is σ = 478492814. Its totient is φ = 478492812.

The previous prime is 478492811. The next prime is 478492823. The reversal of 478492813 is 318294874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 463024324 + 15468489 = 21518^2 + 3933^2 .

It is a cyclic number.

It is not a de Polignac number, because 478492813 - 2¹ = 478492811 is a prime.

Together with 478492811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478492811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239246406 + 239246407.

It is an arithmetic number, because the mean of its divisors is an integer number (239246407).

Almost surely, 2^478492813 is an apocalyptic number.

It is an amenable number.

478492813 is a deficient number, since it is larger than the sum of its proper divisors (1).

478492813 is an equidigital number, since it uses as much as digits as its factorization.

478492813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 46.

The square root of 478492813 is about 21874.4785766427. The cubic root of 478492813 is about 782.1531637686.

The spelling of 478492813 in words is "four hundred seventy-eight million, four hundred ninety-two thousand, eight hundred thirteen".