479147393891 has 8 divisors (see below), whose sum is σ = 504430887120. Its totient is φ = 453870421632.

The previous prime is 479147393807. The next prime is 479147393897. The reversal of 479147393891 is 198393741974.

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-479147393891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (479147393897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1479050 + ... + 1773663.

It is an arithmetic number, because the mean of its divisors is an integer number (63053860890).

Almost surely, 2^479147393891 is an apocalyptic number.

479147393891 is a deficient number, since it is larger than the sum of its proper divisors (25283493229).

479147393891 is a wasteful number, since it uses less digits than its factorization.

479147393891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3260485.

The product of its digits is 41150592, while the sum is 65.

The spelling of 479147393891 in words is "four hundred seventy-nine billion, one hundred forty-seven million, three hundred ninety-three thousand, eight hundred ninety-one".