847672321 has 4 divisors (see below), whose sum is σ = 848402352. Its totient is φ = 846942292.

The previous prime is 847672313. The next prime is 847672363. The reversal of 847672321 is 123276748.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 847672321 - 2³ = 847672313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (847672381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363271 + ... + 365596.

It is an arithmetic number, because the mean of its divisors is an integer number (212100588).

Almost surely, 2^847672321 is an apocalyptic number.

It is an amenable number.

847672321 is a deficient number, since it is larger than the sum of its proper divisors (730031).

847672321 is a wasteful number, since it uses less digits than its factorization.

847672321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730030.

The product of its digits is 112896, while the sum is 40.

The square root of 847672321 is about 29114.8127419704. The cubic root of 847672321 is about 946.4027657544.

The spelling of 847672321 in words is "eight hundred forty-seven million, six hundred seventy-two thousand, three hundred twenty-one".