475456909 has 2 divisors, whose sum is σ = 475456910. Its totient is φ = 475456908.

The previous prime is 475456853. The next prime is 475456913. The reversal of 475456909 is 909654574.

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., 312511684 + 162945225 = 17678^2 + 12765^2 .

It is a cyclic number.

It is not a de Polignac number, because 475456909 - 2⁷ = 475456781 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (475456309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237728454 + 237728455.

It is an arithmetic number, because the mean of its divisors is an integer number (237728455).

Almost surely, 2^475456909 is an apocalyptic number.

It is an amenable number.

475456909 is a deficient number, since it is larger than the sum of its proper divisors (1).

475456909 is an equidigital number, since it uses as much as digits as its factorization.

475456909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1360800, while the sum is 49.

The square root of 475456909 is about 21804.9744095241. The cubic root of 475456909 is about 780.4954714153.

The spelling of 475456909 in words is "four hundred seventy-five million, four hundred fifty-six thousand, nine hundred nine".