79771 has 4 divisors (see below), whose sum is σ = 80344. Its totient is φ = 79200.

The previous prime is 79769. The next prime is 79777. The reversal of 79771 is 17797.

79771 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 79771 - 2¹ = 79769 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (79777) 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 3 ways as a sum of consecutive naturals, for example, 76 + ... + 406.

It is an arithmetic number, because the mean of its divisors is an integer number (20086).

2⁷⁹⁷⁷¹ is an apocalyptic number.

79771 is a deficient number, since it is larger than the sum of its proper divisors (573).

79771 is a wasteful number, since it uses less digits than its factorization.

79771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572.

The product of its digits is 3087, while the sum is 31.

The square root of 79771 is about 282.4376037287. The cubic root of 79771 is about 43.0475407134.

It can be divided in two parts, 797 and 71, that added together give a palindrome (868).

The spelling of 79771 in words is "seventy-nine thousand, seven hundred seventy-one".