475563691 has 2 divisors, whose sum is σ = 475563692. Its totient is φ = 475563690.

The previous prime is 475563677. The next prime is 475563733. The reversal of 475563691 is 196365574.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 475563691 - 2¹³ = 475555499 is a prime.

It is not a weakly prime, because it can be changed into another prime (475563091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 237781845 + 237781846.

It is an arithmetic number, because the mean of its divisors is an integer number (237781846).

Almost surely, 2^475563691 is an apocalyptic number.

475563691 is a deficient number, since it is larger than the sum of its proper divisors (1).

475563691 is an equidigital number, since it uses as much as digits as its factorization.

475563691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 46.

The square root of 475563691 is about 21807.4228417757. The cubic root of 475563691 is about 780.5538970598.

The spelling of 475563691 in words is "four hundred seventy-five million, five hundred sixty-three thousand, six hundred ninety-one".