869065824169 has 9 divisors (see below), whose sum is σ = 870875325021. Its totient is φ = 867260081100.

The previous prime is 869065824061. The next prime is 869065824197. The reversal of 869065824169 is 961428560968.

The square root of 869065824169 is 932237.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 869065824169 - 2²⁷ = 868931606441 is a prime.

It is a super-2 number, since 2×869065824169² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 869065824169.

It is not an unprimeable number, because it can be changed into a prime (869065824269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 826893694 + ... + 826894744.

Almost surely, 2^869065824169 is an apocalyptic number.

869065824169 is the 932237-th square number.

869065824169 is the 466119-th centered octagonal number.

It is an amenable number.

869065824169 is a deficient number, since it is larger than the sum of its proper divisors (1809500852).

869065824169 is an frugal number, since it uses more digits than its factorization.

869065824169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3876 (or 1938 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 64.

Multiplying 869065824169 by its sum of digits (64), we get a square (55620212746816 = 7457896²).

The spelling of 869065824169 in words is "eight hundred sixty-nine billion, sixty-five million, eight hundred twenty-four thousand, one hundred sixty-nine".