849081321 has 27 divisors (see below), whose sum is σ = 1349610717. Its totient is φ = 514011960.

The previous prime is 849081313. The next prime is 849081349. The reversal of 849081321 is 123180948.

The square root of 849081321 is 29139.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 849081321 - 2³ = 849081313 is a prime.

It is a super-2 number, since 2×849081321² = 1441878179342210082, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (849081521) 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 26 ways as a sum of consecutive naturals, for example, 961146 + ... + 962028.

Almost surely, 2^849081321 is an apocalyptic number.

849081321 is the 29139-th square number.

849081321 is the 14570-th centered octagonal number.

It is an amenable number.

849081321 is a deficient number, since it is larger than the sum of its proper divisors (500529396).

849081321 is an equidigital number, since it uses as much as digits as its factorization.

849081321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1794 (or 897 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The cubic root of 849081321 is about 946.9268453656.

Multiplying 849081321 by its sum of digits (36), we get a square (30566927556 = 174834²).

The spelling of 849081321 in words is "eight hundred forty-nine million, eighty-one thousand, three hundred twenty-one".