845789 has 12 divisors (see below), whose sum is σ = 1010268. Its totient is φ = 705600.

The previous prime is 845777. The next prime is 845809. The reversal of 845789 is 987548.

It can be written as a sum of positive squares in 2 ways, for example, as 17689 + 828100 = 133^2 + 910^2 .

It is not a de Polignac number, because 845789 - 2¹⁶ = 780253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1799 + ... + 2219.

It is an arithmetic number, because the mean of its divisors is an integer number (84189).

2⁸⁴⁵⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

845789 is a deficient number, since it is larger than the sum of its proper divisors (164479).

845789 is a wasteful number, since it uses less digits than its factorization.

845789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476 (or 469 counting only the distinct ones).

The product of its digits is 80640, while the sum is 41.

The square root of 845789 is about 919.6678748331. The cubic root of 845789 is about 94.5701354059.

The spelling of 845789 in words is "eight hundred forty-five thousand, seven hundred eighty-nine".