478888561 has 2 divisors, whose sum is σ = 478888562. Its totient is φ = 478888560.

The previous prime is 478888537. The next prime is 478888577. The reversal of 478888561 is 165888874.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 408848400 + 70040161 = 20220^2 + 8369^2 .

It is a cyclic number.

It is not a de Polignac number, because 478888561 - 2²⁵ = 445334129 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (478888511) 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, 239444280 + 239444281.

It is an arithmetic number, because the mean of its divisors is an integer number (239444281).

Almost surely, 2^478888561 is an apocalyptic number.

It is an amenable number.

478888561 is a deficient number, since it is larger than the sum of its proper divisors (1).

478888561 is an equidigital number, since it uses as much as digits as its factorization.

478888561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3440640, while the sum is 55.

The square root of 478888561 is about 21883.5225912100. The cubic root of 478888561 is about 782.3687366710.

The spelling of 478888561 in words is "four hundred seventy-eight million, eight hundred eighty-eight thousand, five hundred sixty-one".