849661047 has 12 divisors (see below), whose sum is σ = 1244574864. Its totient is φ = 558462240.

The previous prime is 849661039. The next prime is 849661049. The reversal of 849661047 is 740166948.

It is not a de Polignac number, because 849661047 - 2³ = 849661039 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 849660993 and 849661011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (849661049) 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, 664198 + ... + 665475.

It is an arithmetic number, because the mean of its divisors is an integer number (103714572).

Almost surely, 2^849661047 is an apocalyptic number.

849661047 is a deficient number, since it is larger than the sum of its proper divisors (394913817).

849661047 is a wasteful number, since it uses less digits than its factorization.

849661047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329750 (or 1329747 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 849661047 is about 29148.9458986084. The cubic root of 849661047 is about 947.1423069510.

The spelling of 849661047 in words is "eight hundred forty-nine million, six hundred sixty-one thousand, forty-seven".