878421211 has 4 divisors (see below), whose sum is σ = 897111072. Its totient is φ = 859731352.

The previous prime is 878421197. The next prime is 878421217. The reversal of 878421211 is 112124878.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112124878 = 2 ⋅56062439.

It is a cyclic number.

It is not a de Polignac number, because 878421211 - 2²⁷ = 744203483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (878421217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9344860 + ... + 9344953.

It is an arithmetic number, because the mean of its divisors is an integer number (224277768).

Almost surely, 2^878421211 is an apocalyptic number.

878421211 is a deficient number, since it is larger than the sum of its proper divisors (18689861).

878421211 is a wasteful number, since it uses less digits than its factorization.

878421211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18689860.

The product of its digits is 7168, while the sum is 34.

The square root of 878421211 is about 29638.1715191744. The cubic root of 878421211 is about 957.7105494935.

The spelling of 878421211 in words is "eight hundred seventy-eight million, four hundred twenty-one thousand, two hundred eleven".