878254249 has 2 divisors, whose sum is σ = 878254250. Its totient is φ = 878254248.

The previous prime is 878254229. The next prime is 878254253. The reversal of 878254249 is 942452878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 722803225 + 155451024 = 26885^2 + 12468^2 .

It is a cyclic number.

It is not a de Polignac number, because 878254249 - 2²⁷ = 744036521 is a prime.

It is not a weakly prime, because it can be changed into another prime (878254219) 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, 439127124 + 439127125.

It is an arithmetic number, because the mean of its divisors is an integer number (439127125).

Almost surely, 2^878254249 is an apocalyptic number.

It is an amenable number.

878254249 is a deficient number, since it is larger than the sum of its proper divisors (1).

878254249 is an equidigital number, since it uses as much as digits as its factorization.

878254249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1290240, while the sum is 49.

The square root of 878254249 is about 29635.3547135849. The cubic root of 878254249 is about 957.6498681261.

The spelling of 878254249 in words is "eight hundred seventy-eight million, two hundred fifty-four thousand, two hundred forty-nine".