849778141 has 8 divisors (see below), whose sum is σ = 865107000. Its totient is φ = 834577920.

The previous prime is 849778117. The next prime is 849778147. The reversal of 849778141 is 141877948.

It can be written as a sum of positive squares in 4 ways, for example, as 4713241 + 845064900 = 2171^2 + 29070^2 .

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

It is not a de Polignac number, because 849778141 - 2⁵ = 849778109 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 (849778147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18780 + ... + 45301.

It is an arithmetic number, because the mean of its divisors is an integer number (108138375).

Almost surely, 2^849778141 is an apocalyptic number.

It is an amenable number.

849778141 is a deficient number, since it is larger than the sum of its proper divisors (15328859).

849778141 is a wasteful number, since it uses less digits than its factorization.

849778141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64319.

The product of its digits is 451584, while the sum is 49.

The square root of 849778141 is about 29150.9543754574. The cubic root of 849778141 is about 947.1858143345.

The spelling of 849778141 in words is "eight hundred forty-nine million, seven hundred seventy-eight thousand, one hundred forty-one".