79766909 has 2 divisors, whose sum is σ = 79766910. Its totient is φ = 79766908.

The previous prime is 79766891. The next prime is 79766927. The reversal of 79766909 is 90966797.

It is a balanced prime because it is at equal distance from previous prime (79766891) and next prime (79766927).

It can be written as a sum of positive squares in only one way, i.e., 66422500 + 13344409 = 8150^2 + 3653^2 .

It is an emirp because it is prime and its reverse (90966797) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79766909 - 2²⁰ = 78718333 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79766969) 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, 39883454 + 39883455.

It is an arithmetic number, because the mean of its divisors is an integer number (39883455).

Almost surely, 2^79766909 is an apocalyptic number.

It is an amenable number.

79766909 is a deficient number, since it is larger than the sum of its proper divisors (1).

79766909 is an equidigital number, since it uses as much as digits as its factorization.

79766909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1285956, while the sum is 53.

The square root of 79766909 is about 8931.2322218158. The cubic root of 79766909 is about 430.4680481312.

The spelling of 79766909 in words is "seventy-nine million, seven hundred sixty-six thousand, nine hundred nine".