871704120745769 has 4 divisors (see below), whose sum is σ = 871705057049796. Its totient is φ = 871703184441744.

The previous prime is 871704120745741. The next prime is 871704120745937. The reversal of 871704120745769 is 967547021407178.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 149008700575744 + 722695420170025 = 12206912^2 + 26882995^2 .

It is a cyclic number.

It is not a de Polignac number, because 871704120745769 - 2¹² = 871704120741673 is a prime.

It is a super-2 number, since 2×871704120745769² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 871704120745699 and 871704120745708.

It is not an unprimeable number, because it can be changed into a prime (871704120747769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 466754114 + ... + 468617979.

It is an arithmetic number, because the mean of its divisors is an integer number (217926264262449).

Almost surely, 2^{871704120745769} is an apocalyptic number.

It is an amenable number.

871704120745769 is a deficient number, since it is larger than the sum of its proper divisors (936304027).

871704120745769 is an equidigital number, since it uses as much as digits as its factorization.

871704120745769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936304026.

The product of its (nonzero) digits is 165957120, while the sum is 68.

The spelling of 871704120745769 in words is "eight hundred seventy-one trillion, seven hundred four billion, one hundred twenty million, seven hundred forty-five thousand, seven hundred sixty-nine".