849178121 has 12 divisors (see below), whose sum is σ = 946190196. Its totient is φ = 761397120.

The previous prime is 849178111. The next prime is 849178123. The reversal of 849178121 is 121871948.

849178121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 612018121 + 237160000 = 24739^2 + 15400^2 .

It is not a de Polignac number, because 849178121 - 2¹⁰ = 849177097 is a prime.

It is a super-2 number, since 2×849178121² = 1442206962370181282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (849178123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39236 + ... + 56901.

It is an arithmetic number, because the mean of its divisors is an integer number (78849183).

Almost surely, 2^849178121 is an apocalyptic number.

It is an amenable number.

849178121 is a deficient number, since it is larger than the sum of its proper divisors (97012075).

849178121 is a wasteful number, since it uses less digits than its factorization.

849178121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96232 (or 96221 counting only the distinct ones).

The product of its digits is 32256, while the sum is 41.

The square root of 849178121 is about 29140.6609568143. The cubic root of 849178121 is about 946.9628289765.

The spelling of 849178121 in words is "eight hundred forty-nine million, one hundred seventy-eight thousand, one hundred twenty-one".