475934821 has 2 divisors, whose sum is σ = 475934822. Its totient is φ = 475934820.

The previous prime is 475934813. The next prime is 475934867. The reversal of 475934821 is 128439574.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 256480225 + 219454596 = 16015^2 + 14814^2 .

It is a cyclic number.

It is not a de Polignac number, because 475934821 - 2³ = 475934813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (475934891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237967410 + 237967411.

It is an arithmetic number, because the mean of its divisors is an integer number (237967411).

Almost surely, 2^475934821 is an apocalyptic number.

It is an amenable number.

475934821 is a deficient number, since it is larger than the sum of its proper divisors (1).

475934821 is an equidigital number, since it uses as much as digits as its factorization.

475934821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 43.

The square root of 475934821 is about 21815.9304408499. The cubic root of 475934821 is about 780.7568924024.

The spelling of 475934821 in words is "four hundred seventy-five million, nine hundred thirty-four thousand, eight hundred twenty-one".