878991423 has 8 divisors (see below), whose sum is σ = 1199244288. Its totient is φ = 572366424.

The previous prime is 878991401. The next prime is 878991439. The reversal of 878991423 is 324199878.

878991423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 878991423 - 2⁹ = 878990911 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878991473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3406815 + ... + 3407072.

It is an arithmetic number, because the mean of its divisors is an integer number (149905536).

Almost surely, 2^878991423 is an apocalyptic number.

878991423 is a deficient number, since it is larger than the sum of its proper divisors (320252865).

878991423 is a wasteful number, since it uses less digits than its factorization.

878991423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6813933.

The product of its digits is 870912, while the sum is 51.

The square root of 878991423 is about 29647.7895128794. The cubic root of 878991423 is about 957.9177317731.

The spelling of 878991423 in words is "eight hundred seventy-eight million, nine hundred ninety-one thousand, four hundred twenty-three".