845879 has 2 divisors, whose sum is σ = 845880. Its totient is φ = 845878.

The previous prime is 845863. The next prime is 845881. The reversal of 845879 is 978548.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 845879 - 2⁴ = 845863 is a prime.

It is a super-2 number, since 2×845879² = 1431022565282, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 845881, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 845879.

It is not a weakly prime, because it can be changed into another prime (845809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422939 + 422940.

It is an arithmetic number, because the mean of its divisors is an integer number (422940).

2⁸⁴⁵⁸⁷⁹ is an apocalyptic number.

845879 is a deficient number, since it is larger than the sum of its proper divisors (1).

845879 is an equidigital number, since it uses as much as digits as its factorization.

845879 is an odious number, because the sum of its binary digits is odd.

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

The square root of 845879 is about 919.7168042392. The cubic root of 845879 is about 94.5734896744.

The spelling of 845879 in words is "eight hundred forty-five thousand, eight hundred seventy-nine".