478823557 has 2 divisors, whose sum is σ = 478823558. Its totient is φ = 478823556.

The previous prime is 478823539. The next prime is 478823573. The reversal of 478823557 is 755328874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 301161316 + 177662241 = 17354^2 + 13329^2 .

It is a cyclic number.

It is not a de Polignac number, because 478823557 - 2²³ = 470434949 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 478823557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478823537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239411778 + 239411779.

It is an arithmetic number, because the mean of its divisors is an integer number (239411779).

Almost surely, 2^478823557 is an apocalyptic number.

It is an amenable number.

478823557 is a deficient number, since it is larger than the sum of its proper divisors (1).

478823557 is an equidigital number, since it uses as much as digits as its factorization.

478823557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1881600, while the sum is 49.

The square root of 478823557 is about 21882.0373137421. The cubic root of 478823557 is about 782.3333356732. Note that the first 5 decimals are identical.

The spelling of 478823557 in words is "four hundred seventy-eight million, eight hundred twenty-three thousand, five hundred fifty-seven".