79181 has 2 divisors, whose sum is σ = 79182. Its totient is φ = 79180.

The previous prime is 79159. The next prime is 79187. The reversal of 79181 is 18197.

79181 is an esthetic number in base 11, because in such base its adjacent digits differ by 1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67081 + 12100 = 259^2 + 110^2 .

It is a cyclic number.

It is not a de Polignac number, because 79181 - 2¹⁰ = 78157 is a prime.

It is a super-2 number, since 2×79181² = 12539261522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 79181.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 79181.

It is not a weakly prime, because it can be changed into another prime (79187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39590 + 39591.

It is an arithmetic number, because the mean of its divisors is an integer number (39591).

2⁷⁹¹⁸¹ is an apocalyptic number.

It is an amenable number.

79181 is a deficient number, since it is larger than the sum of its proper divisors (1).

79181 is an equidigital number, since it uses as much as digits as its factorization.

79181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 26.

The square root of 79181 is about 281.3911867845. The cubic root of 79181 is about 42.9411489850.

The spelling of 79181 in words is "seventy-nine thousand, one hundred eighty-one".