79873 has 2 divisors, whose sum is σ = 79874. Its totient is φ = 79872.

The previous prime is 79867. The next prime is 79889. The reversal of 79873 is 37897.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51984 + 27889 = 228^2 + 167^2 .

It is an emirp because it is prime and its reverse (37897) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79873 - 2⁵ = 79841 is a prime.

It is a super-2 number, since 2×79873² = 12759392258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (79813) 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 as a sum of consecutive naturals, namely, 39936 + 39937.

It is an arithmetic number, because the mean of its divisors is an integer number (39937).

It is a Proth number, since it is equal to 39 ⋅ 2¹¹ + 1 and 39 < 2¹¹.

2⁷⁹⁸⁷³ is an apocalyptic number.

It is an amenable number.

79873 is a deficient number, since it is larger than the sum of its proper divisors (1).

79873 is an equidigital number, since it uses as much as digits as its factorization.

79873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 34.

The square root of 79873 is about 282.6181168998. The cubic root of 79873 is about 43.0658806239.

The spelling of 79873 in words is "seventy-nine thousand, eight hundred seventy-three".