878258961 has 24 divisors (see below), whose sum is σ = 1302375360. Its totient is φ = 570005856.

The previous prime is 878258959. The next prime is 878258989. The reversal of 878258961 is 169852878.

It is not a de Polignac number, because 878258961 - 2¹ = 878258959 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 878258898 and 878258907.

It is not an unprimeable number, because it can be changed into a prime (878258921) 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 in 23 ways as a sum of consecutive naturals, for example, 119100 + ... + 126258.

It is an arithmetic number, because the mean of its divisors is an integer number (54265640).

Almost surely, 2^878258961 is an apocalyptic number.

It is an amenable number.

878258961 is a deficient number, since it is larger than the sum of its proper divisors (424116399).

878258961 is a wasteful number, since it uses less digits than its factorization.

878258961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7525 (or 7522 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 54.

The square root of 878258961 is about 29635.4342131172. The cubic root of 878258961 is about 957.6515807805.

The spelling of 878258961 in words is "eight hundred seventy-eight million, two hundred fifty-eight thousand, nine hundred sixty-one".