878902489 has 2 divisors, whose sum is σ = 878902490. Its totient is φ = 878902488.

The previous prime is 878902487. The next prime is 878902523. The reversal of 878902489 is 984209878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 768232089 + 110670400 = 27717^2 + 10520^2 .

It is a cyclic number.

It is not a de Polignac number, because 878902489 - 2¹ = 878902487 is a prime.

Together with 878902487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (878902481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439451244 + 439451245.

It is an arithmetic number, because the mean of its divisors is an integer number (439451245).

Almost surely, 2^878902489 is an apocalyptic number.

It is an amenable number.

878902489 is a deficient number, since it is larger than the sum of its proper divisors (1).

878902489 is an equidigital number, since it uses as much as digits as its factorization.

878902489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2322432, while the sum is 55.

The square root of 878902489 is about 29646.2896329372. The cubic root of 878902489 is about 957.8854241660.

The spelling of 878902489 in words is "eight hundred seventy-eight million, nine hundred two thousand, four hundred eighty-nine".