79808017 has 4 divisors (see below), whose sum is σ = 81754596. Its totient is φ = 77861440.

The previous prime is 79807997. The next prime is 79808023. The reversal of 79808017 is 71080897.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28313041 + 51494976 = 5321^2 + 7176^2 .

It is a cyclic number.

It is not a de Polignac number, because 79808017 - 2²³ = 71419409 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79808317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 973228 + ... + 973309.

It is an arithmetic number, because the mean of its divisors is an integer number (20438649).

Almost surely, 2^79808017 is an apocalyptic number.

It is an amenable number.

79808017 is a deficient number, since it is larger than the sum of its proper divisors (1946579).

79808017 is a wasteful number, since it uses less digits than its factorization.

79808017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946578.

The product of its (nonzero) digits is 28224, while the sum is 40.

The square root of 79808017 is about 8933.5332875632. The cubic root of 79808017 is about 430.5419828901.

The spelling of 79808017 in words is "seventy-nine million, eight hundred eight thousand, seventeen".