878587 has 4 divisors (see below), whose sum is σ = 884016. Its totient is φ = 873160.

The previous prime is 878573. The next prime is 878593. The reversal of 878587 is 785878.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-878587 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (878567) 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, 2464 + ... + 2797.

It is an arithmetic number, because the mean of its divisors is an integer number (221004).

2⁸⁷⁸⁵⁸⁷ is an apocalyptic number.

878587 is a deficient number, since it is larger than the sum of its proper divisors (5429).

878587 is a wasteful number, since it uses less digits than its factorization.

878587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5428.

The product of its digits is 125440, while the sum is 43.

The square root of 878587 is about 937.3297178688. The cubic root of 878587 is about 95.7770796933. Note that the first 3 decimals are identical.

The spelling of 878587 in words is "eight hundred seventy-eight thousand, five hundred eighty-seven".