847051721 has 8 divisors (see below), whose sum is σ = 860385504. Its totient is φ = 833738400.

The previous prime is 847051687. The next prime is 847051771. The reversal of 847051721 is 127150748.

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

It is a cyclic number.

It is not a de Polignac number, because 847051721 - 2¹⁴ = 847035337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (847051771) 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 7 ways as a sum of consecutive naturals, for example, 92861 + ... + 101573.

It is an arithmetic number, because the mean of its divisors is an integer number (107548188).

Almost surely, 2^847051721 is an apocalyptic number.

It is an amenable number.

847051721 is a deficient number, since it is larger than the sum of its proper divisors (13333783).

847051721 is a wasteful number, since it uses less digits than its factorization.

847051721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10231.

The product of its (nonzero) digits is 15680, while the sum is 35.

The square root of 847051721 is about 29104.1529854418. The cubic root of 847051721 is about 946.1717484401.

The spelling of 847051721 in words is "eight hundred forty-seven million, fifty-one thousand, seven hundred twenty-one".