878121877 has 8 divisors (see below), whose sum is σ = 903744864. Its totient is φ = 852735408.

The previous prime is 878121863. The next prime is 878121883. The reversal of 878121877 is 778121878.

878121877 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 878121877 - 2²³ = 869733269 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 878121877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878121817) 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, 51583 + ... + 66460.

It is an arithmetic number, because the mean of its divisors is an integer number (112968108).

Almost surely, 2^878121877 is an apocalyptic number.

It is an amenable number.

878121877 is a deficient number, since it is larger than the sum of its proper divisors (25622987).

878121877 is a wasteful number, since it uses less digits than its factorization.

878121877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118259.

The product of its digits is 351232, while the sum is 49.

The square root of 878121877 is about 29633.1212834558. The cubic root of 878121877 is about 957.6017528270.

Subtracting from 878121877 its reverse (778121878), we obtain a palindrome (99999999).

The spelling of 878121877 in words is "eight hundred seventy-eight million, one hundred twenty-one thousand, eight hundred seventy-seven".