79165081 has 2 divisors, whose sum is σ = 79165082. Its totient is φ = 79165080.

The previous prime is 79165067. The next prime is 79165111. The reversal of 79165081 is 18056197.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50979600 + 28185481 = 7140^2 + 5309^2 .

It is an emirp because it is prime and its reverse (18056197) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79165081 - 2⁵ = 79165049 is a prime.

It is a super-2 number, since 2×79165081² = 12534220099473122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79165081.

It is not a weakly prime, because it can be changed into another prime (79163081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39582540 + 39582541.

It is an arithmetic number, because the mean of its divisors is an integer number (39582541).

Almost surely, 2^79165081 is an apocalyptic number.

It is an amenable number.

79165081 is a deficient number, since it is larger than the sum of its proper divisors (1).

79165081 is an equidigital number, since it uses as much as digits as its factorization.

79165081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 79165081 is about 8897.4761028058. The cubic root of 79165081 is about 429.3827108094.

The spelling of 79165081 in words is "seventy-nine million, one hundred sixty-five thousand, eighty-one".