476816621 has 2 divisors, whose sum is σ = 476816622. Its totient is φ = 476816620.

The previous prime is 476816603. The next prime is 476816623. The reversal of 476816621 is 126618674.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 463928521 + 12888100 = 21539^2 + 3590^2 .

It is a cyclic number.

It is not a de Polignac number, because 476816621 - 2¹⁰ = 476815597 is a prime.

Together with 476816623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (476816623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 238408310 + 238408311.

It is an arithmetic number, because the mean of its divisors is an integer number (238408311).

Almost surely, 2^476816621 is an apocalyptic number.

It is an amenable number.

476816621 is a deficient number, since it is larger than the sum of its proper divisors (1).

476816621 is an equidigital number, since it uses as much as digits as its factorization.

476816621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 41.

The square root of 476816621 is about 21836.1310904656. The cubic root of 476816621 is about 781.2387837878.

The spelling of 476816621 in words is "four hundred seventy-six million, eight hundred sixteen thousand, six hundred twenty-one".