878398123 has 8 divisors (see below), whose sum is σ = 895775328. Its totient is φ = 861165504.

The previous prime is 878398091. The next prime is 878398133. The reversal of 878398123 is 321893878.

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

It is a cyclic number.

It is not a de Polignac number, because 878398123 - 2⁵ = 878398091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (878398133) 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, 23836 + ... + 48217.

It is an arithmetic number, because the mean of its divisors is an integer number (111971916).

Almost surely, 2^878398123 is an apocalyptic number.

878398123 is a deficient number, since it is larger than the sum of its proper divisors (17377205).

878398123 is a wasteful number, since it uses less digits than its factorization.

878398123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72293.

The product of its digits is 580608, while the sum is 49.

The square root of 878398123 is about 29637.7820189028. The cubic root of 878398123 is about 957.7021587524.

The spelling of 878398123 in words is "eight hundred seventy-eight million, three hundred ninety-eight thousand, one hundred twenty-three".