475799809 has 2 divisors, whose sum is σ = 475799810. Its totient is φ = 475799808.

The previous prime is 475799803. The next prime is 475799837. The reversal of 475799809 is 908997574.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 403889409 + 71910400 = 20097^2 + 8480^2 .

It is a cyclic number.

It is not a de Polignac number, because 475799809 - 2⁹ = 475799297 is a prime.

It is not a weakly prime, because it can be changed into another prime (475799803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237899904 + 237899905.

It is an arithmetic number, because the mean of its divisors is an integer number (237899905).

Almost surely, 2^475799809 is an apocalyptic number.

It is an amenable number.

475799809 is a deficient number, since it is larger than the sum of its proper divisors (1).

475799809 is an equidigital number, since it uses as much as digits as its factorization.

475799809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5715360, while the sum is 58.

The square root of 475799809 is about 21812.8358770702. The cubic root of 475799809 is about 780.6830576992.

The spelling of 475799809 in words is "four hundred seventy-five million, seven hundred ninety-nine thousand, eight hundred nine".