870563 has 4 divisors (see below), whose sum is σ = 873240. Its totient is φ = 867888.

The previous prime is 870547. The next prime is 870577. The reversal of 870563 is 365078.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 870563 - 2⁴ = 870547 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 870563.

It is not an unprimeable number, because it can be changed into a prime (870533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 770 + ... + 1527.

It is an arithmetic number, because the mean of its divisors is an integer number (218310).

2⁸⁷⁰⁵⁶³ is an apocalyptic number.

870563 is a deficient number, since it is larger than the sum of its proper divisors (2677).

870563 is a wasteful number, since it uses less digits than its factorization.

870563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2676.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 870563 is about 933.0396561776. The cubic root of 870563 is about 95.4846150851.

The spelling of 870563 in words is "eight hundred seventy thousand, five hundred sixty-three".