71723 has 4 divisors (see below), whose sum is σ = 75960. Its totient is φ = 67488.

The previous prime is 71719. The next prime is 71741. The reversal of 71723 is 32717.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71723 - 2² = 71719 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71695 and 71704.

It is not an unprimeable number, because it can be changed into a prime (71713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2093 + ... + 2126.

It is an arithmetic number, because the mean of its divisors is an integer number (18990).

2⁷¹⁷²³ is an apocalyptic number.

71723 is a deficient number, since it is larger than the sum of its proper divisors (4237).

71723 is a wasteful number, since it uses less digits than its factorization.

71723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4236.

The product of its digits is 294, while the sum is 20.

The square root of 71723 is about 267.8115008733. The cubic root of 71723 is about 41.5482575996.

The spelling of 71723 in words is "seventy-one thousand, seven hundred twenty-three", and thus it is an iban number.