475193909 has 2 divisors, whose sum is σ = 475193910. Its totient is φ = 475193908.

The previous prime is 475193897. The next prime is 475193951. The reversal of 475193909 is 909391574.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 454627684 + 20566225 = 21322^2 + 4535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-475193909 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (475193959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237596954 + 237596955.

It is an arithmetic number, because the mean of its divisors is an integer number (237596955).

Almost surely, 2^475193909 is an apocalyptic number.

It is an amenable number.

475193909 is a deficient number, since it is larger than the sum of its proper divisors (1).

475193909 is an equidigital number, since it uses as much as digits as its factorization.

475193909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 306180, while the sum is 47.

The square root of 475193909 is about 21798.9428413398. The cubic root of 475193909 is about 780.3515339625.

The spelling of 475193909 in words is "four hundred seventy-five million, one hundred ninety-three thousand, nine hundred nine".