475255309 has 2 divisors, whose sum is σ = 475255310. Its totient is φ = 475255308.

The previous prime is 475255267. The next prime is 475255381. The reversal of 475255309 is 903552574.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 398202025 + 77053284 = 19955^2 + 8778^2 .

It is a cyclic number.

It is not a de Polignac number, because 475255309 - 2⁹ = 475254797 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 (475255709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237627654 + 237627655.

It is an arithmetic number, because the mean of its divisors is an integer number (237627655).

Almost surely, 2^475255309 is an apocalyptic number.

It is an amenable number.

475255309 is a deficient number, since it is larger than the sum of its proper divisors (1).

475255309 is an equidigital number, since it uses as much as digits as its factorization.

475255309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 189000, while the sum is 40.

The square root of 475255309 is about 21800.3511210256. The cubic root of 475255309 is about 780.3851423624.

The spelling of 475255309 in words is "four hundred seventy-five million, two hundred fifty-five thousand, three hundred nine".