878808089 has 2 divisors, whose sum is σ = 878808090. Its totient is φ = 878808088.

The previous prime is 878808061. The next prime is 878808101. The reversal of 878808089 is 980808878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 869778064 + 9030025 = 29492^2 + 3005^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-878808089 is a prime.

It is not a weakly prime, because it can be changed into another prime (878808289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439404044 + 439404045.

It is an arithmetic number, because the mean of its divisors is an integer number (439404045).

Almost surely, 2^878808089 is an apocalyptic number.

It is an amenable number.

878808089 is a deficient number, since it is larger than the sum of its proper divisors (1).

878808089 is an equidigital number, since it uses as much as digits as its factorization.

878808089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2064384, while the sum is 56.

The square root of 878808089 is about 29644.6974853851. The cubic root of 878808089 is about 957.8511285064.

The spelling of 878808089 in words is "eight hundred seventy-eight million, eight hundred eight thousand, eighty-nine".