869388817277 has 2 divisors, whose sum is σ = 869388817278. Its totient is φ = 869388817276.

The previous prime is 869388817247. The next prime is 869388817289. The reversal of 869388817277 is 772718883968.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 741896259556 + 127492557721 = 861334^2 + 357061^2 .

It is a cyclic number.

It is not a de Polignac number, because 869388817277 - 2²⁰ = 869387768701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869388817207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434694408638 + 434694408639.

It is an arithmetic number, because the mean of its divisors is an integer number (434694408639).

Almost surely, 2^869388817277 is an apocalyptic number.

It is an amenable number.

869388817277 is a deficient number, since it is larger than the sum of its proper divisors (1).

869388817277 is an equidigital number, since it uses as much as digits as its factorization.

869388817277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 455196672, while the sum is 74.

The spelling of 869388817277 in words is "eight hundred sixty-nine billion, three hundred eighty-eight million, eight hundred seventeen thousand, two hundred seventy-seven".