879709 has 2 divisors, whose sum is σ = 879710. Its totient is φ = 879708.

The previous prime is 879707. The next prime is 879713. The reversal of 879709 is 907978.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 727609 + 152100 = 853^2 + 390^2 .

It is a cyclic number.

It is not a de Polignac number, because 879709 - 2¹ = 879707 is a prime.

Together with 879707, 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 (879701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439854 + 439855.

It is an arithmetic number, because the mean of its divisors is an integer number (439855).

2⁸⁷⁹⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

879709 is a deficient number, since it is larger than the sum of its proper divisors (1).

879709 is an equidigital number, since it uses as much as digits as its factorization.

879709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 879709 is about 937.9280356189. The cubic root of 879709 is about 95.8178330739.

The spelling of 879709 in words is "eight hundred seventy-nine thousand, seven hundred nine".