845659 has 2 divisors, whose sum is σ = 845660. Its totient is φ = 845658.

The previous prime is 845657. The next prime is 845683. The reversal of 845659 is 956548.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 845659 - 2¹ = 845657 is a prime.

Together with 845657, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (845653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422829 + 422830.

It is an arithmetic number, because the mean of its divisors is an integer number (422830).

2⁸⁴⁵⁶⁵⁹ is an apocalyptic number.

845659 is a deficient number, since it is larger than the sum of its proper divisors (1).

845659 is an equidigital number, since it uses as much as digits as its factorization.

845659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 37.

The square root of 845659 is about 919.5971944281. The cubic root of 845659 is about 94.5652899312.

Subtracting 845659 from its reverse (956548), we obtain a square (110889 = 333²).

It can be divided in two parts, 8456 and 59, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 845659 in words is "eight hundred forty-five thousand, six hundred fifty-nine".