870847 has 2 divisors, whose sum is σ = 870848. Its totient is φ = 870846.

The previous prime is 870833. The next prime is 870853. The reversal of 870847 is 748078.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 870847 - 2¹¹ = 868799 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (870047) 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, 435423 + 435424.

It is an arithmetic number, because the mean of its divisors is an integer number (435424).

2⁸⁷⁰⁸⁴⁷ is an apocalyptic number.

870847 is a deficient number, since it is larger than the sum of its proper divisors (1).

870847 is an equidigital number, since it uses as much as digits as its factorization.

870847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 870847 is about 933.1918345121. The cubic root of 870847 is about 95.4949971338.

The spelling of 870847 in words is "eight hundred seventy thousand, eight hundred forty-seven".