878699867 has 4 divisors (see below), whose sum is σ = 907045056. Its totient is φ = 850354680.

The previous prime is 878699849. The next prime is 878699881. The reversal of 878699867 is 768996878.

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 878699867 - 2¹² = 878695771 is a prime.

It is a super-2 number, since 2×878699867² = 1544226912531635378, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 878699797 and 878699806.

It is not an unprimeable number, because it can be changed into a prime (878690867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14172548 + ... + 14172609.

It is an arithmetic number, because the mean of its divisors is an integer number (226761264).

Almost surely, 2^878699867 is an apocalyptic number.

878699867 is a deficient number, since it is larger than the sum of its proper divisors (28345189).

878699867 is a wasteful number, since it uses less digits than its factorization.

878699867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28345188.

The product of its digits is 73156608, while the sum is 68.

The square root of 878699867 is about 29642.8721111838. The cubic root of 878699867 is about 957.8118082720.

The spelling of 878699867 in words is "eight hundred seventy-eight million, six hundred ninety-nine thousand, eight hundred sixty-seven".