878272861 has 2 divisors, whose sum is σ = 878272862. Its totient is φ = 878272860.

The previous prime is 878272831. The next prime is 878272877. The reversal of 878272861 is 168272878.

878272861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 585349636 + 292923225 = 24194^2 + 17115^2 .

It is a cyclic number.

It is not a de Polignac number, because 878272861 - 2⁹ = 878272349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878272831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439136430 + 439136431.

It is an arithmetic number, because the mean of its divisors is an integer number (439136431).

Almost surely, 2^878272861 is an apocalyptic number.

It is an amenable number.

878272861 is a deficient number, since it is larger than the sum of its proper divisors (1).

878272861 is an equidigital number, since it uses as much as digits as its factorization.

878272861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 602112, while the sum is 49.

The square root of 878272861 is about 29635.6687287464. The cubic root of 878272861 is about 957.6566329300.

The spelling of 878272861 in words is "eight hundred seventy-eight million, two hundred seventy-two thousand, eight hundred sixty-one".