849965 has 16 divisors (see below), whose sum is σ = 1123200. Its totient is φ = 614592.

The previous prime is 849943. The next prime is 849967. The reversal of 849965 is 569948.

849965 = 93² + 94² + ... + 149².

It is a cyclic number.

It is not a de Polignac number, because 849965 - 2¹⁰ = 848941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (849967) 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 15 ways as a sum of consecutive naturals, for example, 1991 + ... + 2379.

It is an arithmetic number, because the mean of its divisors is an integer number (70200).

2⁸⁴⁹⁹⁶⁵ is an apocalyptic number.

It is an amenable number.

849965 is a deficient number, since it is larger than the sum of its proper divisors (273235).

849965 is a wasteful number, since it uses less digits than its factorization.

849965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436.

The product of its digits is 77760, while the sum is 41.

The square root of 849965 is about 921.9354641188. The cubic root of 849965 is about 94.7255235287.

The spelling of 849965 in words is "eight hundred forty-nine thousand, nine hundred sixty-five".