845623 has 2 divisors, whose sum is σ = 845624. Its totient is φ = 845622.

The previous prime is 845599. The next prime is 845653. The reversal of 845623 is 326548.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 845623 - 2⁹ = 845111 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 845591 and 845600.

It is a congruent number.

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, 422811 + 422812.

It is an arithmetic number, because the mean of its divisors is an integer number (422812).

2⁸⁴⁵⁶²³ is an apocalyptic number.

845623 is a deficient number, since it is larger than the sum of its proper divisors (1).

845623 is an equidigital number, since it uses as much as digits as its factorization.

845623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 28.

The square root of 845623 is about 919.5776204323. The cubic root of 845623 is about 94.5639480197.

The spelling of 845623 in words is "eight hundred forty-five thousand, six hundred twenty-three".