79790617 has 4 divisors (see below), whose sum is σ = 80133300. Its totient is φ = 79447936.

The previous prime is 79790609. The next prime is 79790663. The reversal of 79790617 is 71609797.

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 8826841 + 70963776 = 2971^2 + 8424^2 .

It is a cyclic number.

It is not a de Polignac number, because 79790617 - 2³ = 79790609 is a prime.

It is a super-2 number, since 2×79790617² = 12733085122481378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79790017) 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, 170992 + ... + 171457.

It is an arithmetic number, because the mean of its divisors is an integer number (20033325).

Almost surely, 2^79790617 is an apocalyptic number.

It is an amenable number.

79790617 is a deficient number, since it is larger than the sum of its proper divisors (342683).

79790617 is a wasteful number, since it uses less digits than its factorization.

79790617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342682.

The product of its (nonzero) digits is 166698, while the sum is 46.

The square root of 79790617 is about 8932.5593756773. The cubic root of 79790617 is about 430.5106912343.

The spelling of 79790617 in words is "seventy-nine million, seven hundred ninety thousand, six hundred seventeen".