849971 has 4 divisors (see below), whose sum is σ = 870744. Its totient is φ = 829200.

The previous prime is 849967. The next prime is 849973. The reversal of 849971 is 179948.

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 849971 - 2² = 849967 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (849973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10325 + ... + 10406.

It is an arithmetic number, because the mean of its divisors is an integer number (217686).

2⁸⁴⁹⁹⁷¹ is an apocalyptic number.

849971 is a deficient number, since it is larger than the sum of its proper divisors (20773).

849971 is a wasteful number, since it uses less digits than its factorization.

849971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20772.

The product of its digits is 18144, while the sum is 38.

The square root of 849971 is about 921.9387181369. The cubic root of 849971 is about 94.7257464209.

The spelling of 849971 in words is "eight hundred forty-nine thousand, nine hundred seventy-one".