849091847 has 4 divisors (see below), whose sum is σ = 854790600. Its totient is φ = 843393096.

The previous prime is 849091823. The next prime is 849091849. The reversal of 849091847 is 748190948.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 849091847 - 2²⁴ = 832314631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 849091795 and 849091804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (849091849) 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, 2849153 + ... + 2849450.

It is an arithmetic number, because the mean of its divisors is an integer number (213697650).

Almost surely, 2^849091847 is an apocalyptic number.

849091847 is a deficient number, since it is larger than the sum of its proper divisors (5698753).

849091847 is a wasteful number, since it uses less digits than its factorization.

849091847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5698752.

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 849091847 is about 29139.1806164827. The cubic root of 849091847 is about 946.9307583441.

The spelling of 849091847 in words is "eight hundred forty-nine million, ninety-one thousand, eight hundred forty-seven".