475469991 has 12 divisors (see below), whose sum is σ = 727189632. Its totient is φ = 298334016.

The previous prime is 475469977. The next prime is 475469999. The reversal of 475469991 is 199964574.

It is a happy number.

475469991 is a `hidden beast` number, since 4 + 7 + 546 + 9 + 9 + 91 = 666.

It is not a de Polignac number, because 475469991 - 2⁵ = 475469959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (475469999) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1553671 + ... + 1553976.

It is an arithmetic number, because the mean of its divisors is an integer number (60599136).

Almost surely, 2^475469991 is an apocalyptic number.

475469991 is a deficient number, since it is larger than the sum of its proper divisors (251719641).

475469991 is a wasteful number, since it uses less digits than its factorization.

475469991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3107670 (or 3107667 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 475469991 is about 21805.2743848822. The cubic root of 475469991 is about 780.5026296863.

The spelling of 475469991 in words is "four hundred seventy-five million, four hundred sixty-nine thousand, nine hundred ninety-one".