878617573 has 4 divisors (see below), whose sum is σ = 880876620. Its totient is φ = 876358528.

The previous prime is 878617567. The next prime is 878617583. The reversal of 878617573 is 375716878.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 375716878 = 2 ⋅187858439.

It can be written as a sum of positive squares in 2 ways, for example, as 284866884 + 593750689 = 16878^2 + 24367^2 .

It is a cyclic number.

It is not a de Polignac number, because 878617573 - 2²⁹ = 341746661 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 878617573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878617583) 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, 1128940 + ... + 1129717.

It is an arithmetic number, because the mean of its divisors is an integer number (220219155).

Almost surely, 2^878617573 is an apocalyptic number.

It is an amenable number.

878617573 is a deficient number, since it is larger than the sum of its proper divisors (2259047).

878617573 is a wasteful number, since it uses less digits than its factorization.

878617573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2259046.

The product of its digits is 1975680, while the sum is 52.

The square root of 878617573 is about 29641.4839878168. The cubic root of 878617573 is about 957.7819062813.

It can be divided in two parts, 8786 and 17573, that multiplied together give a triangular number (154396378 = T₁₇₅₇₂).

The spelling of 878617573 in words is "eight hundred seventy-eight million, six hundred seventeen thousand, five hundred seventy-three".