79709 has 8 divisors (see below), whose sum is σ = 93120. Its totient is φ = 66816.

The previous prime is 79699. The next prime is 79757. The reversal of 79709 is 90797.

79709 = 162² + 163² + 164².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79709 - 2⁴ = 79693 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79769) 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 7 ways as a sum of consecutive naturals, for example, 317 + ... + 509.

It is an arithmetic number, because the mean of its divisors is an integer number (11640).

2⁷⁹⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

79709 is a deficient number, since it is larger than the sum of its proper divisors (13411).

79709 is a wasteful number, since it uses less digits than its factorization.

79709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259.

The product of its (nonzero) digits is 3969, while the sum is 32.

The square root of 79709 is about 282.3278236377. The cubic root of 79709 is about 43.0363852840.

The spelling of 79709 in words is "seventy-nine thousand, seven hundred nine".