873709 has 2 divisors, whose sum is σ = 873710. Its totient is φ = 873708.

The previous prime is 873707. The next prime is 873721. The reversal of 873709 is 907378.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 675684 + 198025 = 822^2 + 445^2 .

It is a cyclic number.

It is not a de Polignac number, because 873709 - 2¹ = 873707 is a prime.

Together with 873707, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (873707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436854 + 436855.

It is an arithmetic number, because the mean of its divisors is an integer number (436855).

2⁸⁷³⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

873709 is a deficient number, since it is larger than the sum of its proper divisors (1).

873709 is an equidigital number, since it uses as much as digits as its factorization.

873709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 873709 is about 934.7240234422. The cubic root of 873709 is about 95.5994960963.

The spelling of 873709 in words is "eight hundred seventy-three thousand, seven hundred nine".