873569 has 2 divisors, whose sum is σ = 873570. Its totient is φ = 873568.

The previous prime is 873553. The next prime is 873571. The reversal of 873569 is 965378.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 833569 + 40000 = 913^2 + 200^2 .

It is a cyclic number.

It is not a de Polignac number, because 873569 - 2⁴ = 873553 is a prime.

It is a super-2 number, since 2×873569² = 1526245595522, which contains 22 as substring.

Together with 873571, 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 (873529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436784 + 436785.

It is an arithmetic number, because the mean of its divisors is an integer number (436785).

2⁸⁷³⁵⁶⁹ is an apocalyptic number.

It is an amenable number.

873569 is a deficient number, since it is larger than the sum of its proper divisors (1).

873569 is an equidigital number, since it uses as much as digits as its factorization.

873569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 38.

The square root of 873569 is about 934.6491320276. The cubic root of 873569 is about 95.5943896499.

Subtracting 873569 from its reverse (965378), we obtain a square (91809 = 303²).

The spelling of 873569 in words is "eight hundred seventy-three thousand, five hundred sixty-nine".