475661139 has 8 divisors (see below), whose sum is σ = 671521680. Its totient is φ = 298454016.

The previous prime is 475661119. The next prime is 475661149. The reversal of 475661139 is 931166574.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-475661139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 475661139.

It is not an unprimeable number, because it can be changed into a prime (475661119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4663294 + ... + 4663395.

It is an arithmetic number, because the mean of its divisors is an integer number (83940210).

Almost surely, 2^475661139 is an apocalyptic number.

475661139 is a deficient number, since it is larger than the sum of its proper divisors (195860541).

475661139 is a wasteful number, since it uses less digits than its factorization.

475661139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9326709.

The product of its digits is 136080, while the sum is 42.

The square root of 475661139 is about 21809.6570124337. The cubic root of 475661139 is about 780.6072079852.

It can be divided in two parts, 475661 and 139, that added together give a triangular number (475800 = T₉₇₅).

The spelling of 475661139 in words is "four hundred seventy-five million, six hundred sixty-one thousand, one hundred thirty-nine".