871369 has 4 divisors (see below), whose sum is σ = 922644. Its totient is φ = 820096.

The previous prime is 871349. The next prime is 871393. The reversal of 871369 is 963178.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 963178 = 2 ⋅481589.

It can be written as a sum of positive squares in 2 ways, for example, as 345744 + 525625 = 588^2 + 725^2 .

It is a cyclic number.

It is not a de Polignac number, because 871369 - 2⁵ = 871337 is a prime.

It is a super-2 number, since 2×871369² = 1518567868322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25612 + ... + 25645.

It is an arithmetic number, because the mean of its divisors is an integer number (230661).

2⁸⁷¹³⁶⁹ is an apocalyptic number.

It is an amenable number.

871369 is a deficient number, since it is larger than the sum of its proper divisors (51275).

871369 is a wasteful number, since it uses less digits than its factorization.

871369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51274.

The product of its digits is 9072, while the sum is 34.

The square root of 871369 is about 933.4714778717. The cubic root of 871369 is about 95.5140737462.

Subtracting 871369 from its reverse (963178), we obtain a square (91809 = 303²).

The spelling of 871369 in words is "eight hundred seventy-one thousand, three hundred sixty-nine".