849191 has 4 divisors (see below), whose sum is σ = 970512. Its totient is φ = 727872.

The previous prime is 849179. The next prime is 849197. The reversal of 849191 is 191948.

849191 = 191² + 192² + ... + 211².

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 849191 - 2⁶ = 849127 is a prime.

It is a super-2 number, since 2×849191² = 1442250708962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (849197) 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, 60650 + ... + 60663.

It is an arithmetic number, because the mean of its divisors is an integer number (242628).

2⁸⁴⁹¹⁹¹ is an apocalyptic number.

849191 is a deficient number, since it is larger than the sum of its proper divisors (121321).

849191 is a wasteful number, since it uses less digits than its factorization.

849191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121320.

The product of its digits is 2592, while the sum is 32.

The square root of 849191 is about 921.5155994339. The cubic root of 849191 is about 94.6967616301.

The spelling of 849191 in words is "eight hundred forty-nine thousand, one hundred ninety-one".