878849173 has 2 divisors, whose sum is σ = 878849174. Its totient is φ = 878849172.

The previous prime is 878849149. The next prime is 878849183. The reversal of 878849173 is 371948878.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 863301924 + 15547249 = 29382^2 + 3943^2 .

It is a cyclic number.

It is not a de Polignac number, because 878849173 - 2¹⁷ = 878718101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878849183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439424586 + 439424587.

It is an arithmetic number, because the mean of its divisors is an integer number (439424587).

Almost surely, 2^878849173 is an apocalyptic number.

It is an amenable number.

878849173 is a deficient number, since it is larger than the sum of its proper divisors (1).

878849173 is an equidigital number, since it uses as much as digits as its factorization.

878849173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2709504, while the sum is 55.

The square root of 878849173 is about 29645.3904173988. The cubic root of 878849173 is about 957.8660546862.

The spelling of 878849173 in words is "eight hundred seventy-eight million, eight hundred forty-nine thousand, one hundred seventy-three".