846989221 has 4 divisors (see below), whose sum is σ = 912142252. Its totient is φ = 781836192.

The previous prime is 846989219. The next prime is 846989243. The reversal of 846989221 is 122989648.

846989221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 234426721 + 612562500 = 15311^2 + 24750^2 .

It is a cyclic number.

It is not a de Polignac number, because 846989221 - 2¹ = 846989219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (846989261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32576496 + ... + 32576521.

It is an arithmetic number, because the mean of its divisors is an integer number (228035563).

Almost surely, 2^846989221 is an apocalyptic number.

It is an amenable number.

846989221 is a deficient number, since it is larger than the sum of its proper divisors (65153031).

846989221 is a wasteful number, since it uses less digits than its factorization.

846989221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65153030.

The product of its digits is 497664, while the sum is 49.

The square root of 846989221 is about 29103.0792357097. The cubic root of 846989221 is about 946.1484766660.

The spelling of 846989221 in words is "eight hundred forty-six million, nine hundred eighty-nine thousand, two hundred twenty-one".