845999 has 8 divisors (see below), whose sum is σ = 1054848. Its totient is φ = 659160.

The previous prime is 845989. The next prime is 846037. The reversal of 845999 is 999548.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 845999 - 2⁴ = 845983 is a prime.

It is a Duffinian number.

845999 is a modest number, since divided by 999 gives 845 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5417 + ... + 5570.

It is an arithmetic number, because the mean of its divisors is an integer number (131856).

2⁸⁴⁵⁹⁹⁹ is an apocalyptic number.

845999 is a deficient number, since it is larger than the sum of its proper divisors (208849).

845999 is a wasteful number, since it uses less digits than its factorization.

845999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11005.

The product of its digits is 116640, while the sum is 44.

The square root of 845999 is about 919.7820393985. The cubic root of 845999 is about 94.5779616624.

It can be divided in two parts, 8459 and 99, that added together give a palindrome (8558).

The spelling of 845999 in words is "eight hundred forty-five thousand, nine hundred ninety-nine".