97709 has 4 divisors (see below), whose sum is σ = 98400. Its totient is φ = 97020.

The previous prime is 97687. The next prime is 97711. The reversal of 97709 is 90779.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 90779 = 13 ⋅6983.

It is a cyclic number.

It is not a de Polignac number, because 97709 - 2⁸ = 97453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47 + ... + 444.

It is an arithmetic number, because the mean of its divisors is an integer number (24600).

2⁹⁷⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

97709 is a deficient number, since it is larger than the sum of its proper divisors (691).

97709 is a wasteful number, since it uses less digits than its factorization.

97709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690.

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

The square root of 97709 is about 312.5843886057. The cubic root of 97709 is about 46.0586837674.

It can be divided in two parts, 9770 and 9, that added together give a palindrome (9779).

The spelling of 97709 in words is "ninety-seven thousand, seven hundred nine".