475348991 has 4 divisors (see below), whose sum is σ = 511914312. Its totient is φ = 438783672.

The previous prime is 475348969. The next prime is 475349099. The reversal of 475348991 is 199843574.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 475348991 - 2⁶ = 475348927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (475348901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18282641 + ... + 18282666.

It is an arithmetic number, because the mean of its divisors is an integer number (127978578).

Almost surely, 2^475348991 is an apocalyptic number.

475348991 is a deficient number, since it is larger than the sum of its proper divisors (36565321).

475348991 is a wasteful number, since it uses less digits than its factorization.

475348991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36565320.

The product of its digits is 1088640, while the sum is 50.

The square root of 475348991 is about 21802.4996502695. The cubic root of 475348991 is about 780.4364153213.

The spelling of 475348991 in words is "four hundred seventy-five million, three hundred forty-eight thousand, nine hundred ninety-one".