878198071 has 4 divisors (see below), whose sum is σ = 901933192. Its totient is φ = 854462952.

The previous prime is 878198051. The next prime is 878198081. The reversal of 878198071 is 170891878.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 170891878 = 2 ⋅85445939.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-878198071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878198021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11867505 + ... + 11867578.

It is an arithmetic number, because the mean of its divisors is an integer number (225483298).

Almost surely, 2^878198071 is an apocalyptic number.

878198071 is a deficient number, since it is larger than the sum of its proper divisors (23735121).

878198071 is a wasteful number, since it uses less digits than its factorization.

878198071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23735120.

The product of its (nonzero) digits is 225792, while the sum is 49.

The square root of 878198071 is about 29634.4068778169. The cubic root of 878198071 is about 957.6294488297.

The spelling of 878198071 in words is "eight hundred seventy-eight million, one hundred ninety-eight thousand, seventy-one".