475881409 has 2 divisors, whose sum is σ = 475881410. Its totient is φ = 475881408.

The previous prime is 475881359. The next prime is 475881449. The reversal of 475881409 is 904188574.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 398880784 + 77000625 = 19972^2 + 8775^2 .

It is a cyclic number.

It is not a de Polignac number, because 475881409 - 2⁷ = 475881281 is a prime.

It is not a weakly prime, because it can be changed into another prime (475881449) 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, 237940704 + 237940705.

It is an arithmetic number, because the mean of its divisors is an integer number (237940705).

Almost surely, 2^475881409 is an apocalyptic number.

It is an amenable number.

475881409 is a deficient number, since it is larger than the sum of its proper divisors (1).

475881409 is an equidigital number, since it uses as much as digits as its factorization.

475881409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 322560, while the sum is 46.

The square root of 475881409 is about 21814.7062551848. The cubic root of 475881409 is about 780.7276843783.

The spelling of 475881409 in words is "four hundred seventy-five million, eight hundred eighty-one thousand, four hundred nine".