476807561 has 2 divisors, whose sum is σ = 476807562. Its totient is φ = 476807560.

The previous prime is 476807509. The next prime is 476807563. The reversal of 476807561 is 165708674.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 388090000 + 88717561 = 19700^2 + 9419^2 .

It is a cyclic number.

It is not a de Polignac number, because 476807561 - 2²² = 472613257 is a prime.

Together with 476807563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (476807563) 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, 238403780 + 238403781.

It is an arithmetic number, because the mean of its divisors is an integer number (238403781).

Almost surely, 2^476807561 is an apocalyptic number.

It is an amenable number.

476807561 is a deficient number, since it is larger than the sum of its proper divisors (1).

476807561 is an equidigital number, since it uses as much as digits as its factorization.

476807561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 476807561 is about 21835.9236351477. The cubic root of 476807561 is about 781.2338356464.

The spelling of 476807561 in words is "four hundred seventy-six million, eight hundred seven thousand, five hundred sixty-one".