79806017 has 2 divisors, whose sum is σ = 79806018. Its totient is φ = 79806016.

The previous prime is 79806011. The next prime is 79806019. The reversal of 79806017 is 71060897.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74926336 + 4879681 = 8656^2 + 2209^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79806017 is a prime.

Together with 79806019, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79806011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39903008 + 39903009.

It is an arithmetic number, because the mean of its divisors is an integer number (39903009).

Almost surely, 2^79806017 is an apocalyptic number.

It is an amenable number.

79806017 is a deficient number, since it is larger than the sum of its proper divisors (1).

79806017 is an equidigital number, since it uses as much as digits as its factorization.

79806017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 79806017 is about 8933.4213490689. The cubic root of 79806017 is about 430.5383863794.

The spelling of 79806017 in words is "seventy-nine million, eight hundred six thousand, seventeen".