878611 has 4 divisors (see below), whose sum is σ = 930312. Its totient is φ = 826912.

The previous prime is 878609. The next prime is 878621. The reversal of 878611 is 116878.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 116878 = 2 ⋅58439.

It is a cyclic number.

It is not a de Polignac number, because 878611 - 2¹ = 878609 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (878621) 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, 25825 + ... + 25858.

It is an arithmetic number, because the mean of its divisors is an integer number (232578).

2⁸⁷⁸⁶¹¹ is an apocalyptic number.

878611 is a deficient number, since it is larger than the sum of its proper divisors (51701).

878611 is a wasteful number, since it uses less digits than its factorization.

878611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51700.

The product of its digits is 2688, while the sum is 31.

The square root of 878611 is about 937.3425201067. The cubic root of 878611 is about 95.7779517864. Note that the first 3 decimals are identical.

The spelling of 878611 in words is "eight hundred seventy-eight thousand, six hundred eleven".