475991342209 has 2 divisors, whose sum is σ = 475991342210. Its totient is φ = 475991342208.

The previous prime is 475991342179. The next prime is 475991342221. The reversal of 475991342209 is 902243199574.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 393470161984 + 82521180225 = 627272^2 + 287265^2 .

It is a cyclic number.

It is not a de Polignac number, because 475991342209 - 2⁹ = 475991341697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 475991342209.

It is not a weakly prime, because it can be changed into another prime (475991342009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237995671104 + 237995671105.

It is an arithmetic number, because the mean of its divisors is an integer number (237995671105).

Almost surely, 2^475991342209 is an apocalyptic number.

It is an amenable number.

475991342209 is a deficient number, since it is larger than the sum of its proper divisors (1).

475991342209 is an equidigital number, since it uses as much as digits as its factorization.

475991342209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4898880, while the sum is 55.

The spelling of 475991342209 in words is "four hundred seventy-five billion, nine hundred ninety-one million, three hundred forty-two thousand, two hundred nine".