71697 has 4 divisors (see below), whose sum is σ = 95600. Its totient is φ = 47796.

The previous prime is 71693. The next prime is 71699. The reversal of 71697 is 79617.

71697 is nontrivially palindromic in base 16.

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 an emirpimes, since its reverse is a distinct semiprime: 79617 = 3 ⋅26539.

It is not a de Polignac number, because 71697 - 2² = 71693 is a prime.

It is a D-number.

It is a Duffinian number.

71697 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 71697.

It is not an unprimeable number, because it can be changed into a prime (71693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11947 + ... + 11952.

It is an arithmetic number, because the mean of its divisors is an integer number (23900).

2⁷¹⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

71697 is a deficient number, since it is larger than the sum of its proper divisors (23903).

71697 is a wasteful number, since it uses less digits than its factorization.

71697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23902.

The product of its digits is 2646, while the sum is 30.

The square root of 71697 is about 267.7629548687. The cubic root of 71697 is about 41.5432364987.

The spelling of 71697 in words is "seventy-one thousand, six hundred ninety-seven".