849217641 has 4 divisors (see below), whose sum is σ = 1132290192. Its totient is φ = 566145092.

The previous prime is 849217613. The next prime is 849217703. The reversal of 849217641 is 146712948.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 849217641 - 2⁷ = 849217513 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 849217593 and 849217602.

It is not an unprimeable number, because it can be changed into a prime (849217841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141536271 + ... + 141536276.

It is an arithmetic number, because the mean of its divisors is an integer number (283072548).

Almost surely, 2^849217641 is an apocalyptic number.

It is an amenable number.

849217641 is a deficient number, since it is larger than the sum of its proper divisors (283072551).

849217641 is a wasteful number, since it uses less digits than its factorization.

849217641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283072550.

The product of its digits is 96768, while the sum is 42.

The square root of 849217641 is about 29141.3390392411. The cubic root of 849217641 is about 946.9775190199.

The spelling of 849217641 in words is "eight hundred forty-nine million, two hundred seventeen thousand, six hundred forty-one".