79975271 has 2 divisors, whose sum is σ = 79975272. Its totient is φ = 79975270.

The previous prime is 79975261. The next prime is 79975307. The reversal of 79975271 is 17257997.

It is a weak prime.

It is an emirp because it is prime and its reverse (17257997) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79975271 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79975201) 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 as a sum of consecutive naturals, namely, 39987635 + 39987636.

It is an arithmetic number, because the mean of its divisors is an integer number (39987636).

Almost surely, 2^79975271 is an apocalyptic number.

79975271 is a deficient number, since it is larger than the sum of its proper divisors (1).

79975271 is an equidigital number, since it uses as much as digits as its factorization.

79975271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 277830, while the sum is 47.

The square root of 79975271 is about 8942.8894100285. The cubic root of 79975271 is about 430.8425359181.

The spelling of 79975271 in words is "seventy-nine million, nine hundred seventy-five thousand, two hundred seventy-one".