845987 has 2 divisors, whose sum is σ = 845988. Its totient is φ = 845986.

The previous prime is 845983. The next prime is 845989. The reversal of 845987 is 789548.

845987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 845987 - 2² = 845983 is a prime.

Together with 845989, it forms a pair of twin primes.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 845987.

It is not a weakly prime, because it can be changed into another prime (845981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422993 + 422994.

It is an arithmetic number, because the mean of its divisors is an integer number (422994).

2⁸⁴⁵⁹⁸⁷ is an apocalyptic number.

845987 is a deficient number, since it is larger than the sum of its proper divisors (1).

845987 is an equidigital number, since it uses as much as digits as its factorization.

845987 is an evil number, because the sum of its binary digits is even.

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

The square root of 845987 is about 919.7755160907. The cubic root of 845987 is about 94.5775144826.

The spelling of 845987 in words is "eight hundred forty-five thousand, nine hundred eighty-seven".