475639893 has 12 divisors (see below), whose sum is σ = 703792908. Its totient is φ = 309359040.

The previous prime is 475639891. The next prime is 475639897. The reversal of 475639893 is 398936574.

It can be written as a sum of positive squares in 2 ways, for example, as 67519089 + 408120804 = 8217^2 + 20202^2 .

It is not a de Polignac number, because 475639893 - 2¹ = 475639891 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (475639891) 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, 644130 + ... + 644867.

It is an arithmetic number, because the mean of its divisors is an integer number (58649409).

Almost surely, 2^475639893 is an apocalyptic number.

It is an amenable number.

475639893 is a deficient number, since it is larger than the sum of its proper divisors (228153015).

475639893 is a wasteful number, since it uses less digits than its factorization.

475639893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289044 (or 1289041 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 54.

The square root of 475639893 is about 21809.1699291835. The cubic root of 475639893 is about 780.5955855462.

The spelling of 475639893 in words is "four hundred seventy-five million, six hundred thirty-nine thousand, eight hundred ninety-three".