878985281 has 2 divisors, whose sum is σ = 878985282. Its totient is φ = 878985280.

The previous prime is 878985269. The next prime is 878985301. The reversal of 878985281 is 182589878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 553002256 + 325983025 = 23516^2 + 18055^2 .

It is a cyclic number.

It is not a de Polignac number, because 878985281 - 2¹⁸ = 878723137 is a prime.

It is a super-2 number, since 2×878985281² = 1545230248429297922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (878285281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439492640 + 439492641.

It is an arithmetic number, because the mean of its divisors is an integer number (439492641).

Almost surely, 2^878985281 is an apocalyptic number.

It is an amenable number.

878985281 is a deficient number, since it is larger than the sum of its proper divisors (1).

878985281 is an equidigital number, since it uses as much as digits as its factorization.

878985281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2580480, while the sum is 56.

The square root of 878985281 is about 29647.6859299339. The cubic root of 878985281 is about 957.9155006007.

The spelling of 878985281 in words is "eight hundred seventy-eight million, nine hundred eighty-five thousand, two hundred eighty-one".