3128847473 has 4 divisors (see below), whose sum is σ = 3205160868. Its totient is φ = 3052534080.

The previous prime is 3128847461. The next prime is 3128847479. The reversal of 3128847473 is 3747488213.

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

It can be written as a sum of positive squares in 2 ways, for example, as 413186929 + 2715660544 = 20327^2 + 52112^2 .

It is a cyclic number.

It is not a de Polignac number, because 3128847473 - 2⁸ = 3128847217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3128847479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38156636 + ... + 38156717.

It is an arithmetic number, because the mean of its divisors is an integer number (801290217).

Almost surely, 2^3128847473 is an apocalyptic number.

It is an amenable number.

3128847473 is a deficient number, since it is larger than the sum of its proper divisors (76313395).

3128847473 is an equidigital number, since it uses as much as digits as its factorization.

3128847473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76313394.

The product of its digits is 903168, while the sum is 47.

The square root of 3128847473 is about 55936.1016964894. The cubic root of 3128847473 is about 1462.6086272640.

The spelling of 3128847473 in words is "three billion, one hundred twenty-eight million, eight hundred forty-seven thousand, four hundred seventy-three".