869388817289 has 2 divisors, whose sum is σ = 869388817290. Its totient is φ = 869388817288.

The previous prime is 869388817277. The next prime is 869388817291. The reversal of 869388817289 is 982718883968.

869388817289 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., 781703539600 + 87685277689 = 884140^2 + 296117^2 .

It is a cyclic number.

It is not a de Polignac number, because 869388817289 - 2²⁰ = 869387768713 is a prime.

Together with 869388817291, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (869388817789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434694408644 + 434694408645.

It is an arithmetic number, because the mean of its divisors is an integer number (434694408645).

Almost surely, 2^869388817289 is an apocalyptic number.

It is an amenable number.

869388817289 is a deficient number, since it is larger than the sum of its proper divisors (1).

869388817289 is an equidigital number, since it uses as much as digits as its factorization.

869388817289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 668860416, while the sum is 77.

The spelling of 869388817289 in words is "eight hundred sixty-nine billion, three hundred eighty-eight million, eight hundred seventeen thousand, two hundred eighty-nine".