71679 has 4 divisors (see below), whose sum is σ = 95576. Its totient is φ = 47784.

The previous prime is 71671. The next prime is 71693. The reversal of 71679 is 97617.

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

It is not a de Polignac number, because 71679 - 2³ = 71671 is a prime.

It is a D-number.

It is a Duffinian number.

71679 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11944 + ... + 11949.

It is an arithmetic number, because the mean of its divisors is an integer number (23894).

2⁷¹⁶⁷⁹ is an apocalyptic number.

71679 is a deficient number, since it is larger than the sum of its proper divisors (23897).

71679 is a wasteful number, since it uses less digits than its factorization.

71679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23896.

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

The square root of 71679 is about 267.7293409397. The cubic root of 71679 is about 41.5397596408.

The spelling of 71679 in words is "seventy-one thousand, six hundred seventy-nine".