79117061 has 4 divisors (see below), whose sum is σ = 80414124. Its totient is φ = 77820000.

The previous prime is 79117043. The next prime is 79117097. The reversal of 79117061 is 16071197.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16071197 = 2969 ⋅5413.

It can be written as a sum of positive squares in 2 ways, for example, as 20884900 + 58232161 = 4570^2 + 7631^2 .

It is a cyclic number.

It is not a de Polignac number, because 79117061 - 2²⁶ = 12008197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79117001) 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, 648440 + ... + 648561.

It is an arithmetic number, because the mean of its divisors is an integer number (20103531).

Almost surely, 2^79117061 is an apocalyptic number.

It is an amenable number.

79117061 is a deficient number, since it is larger than the sum of its proper divisors (1297063).

79117061 is a wasteful number, since it uses less digits than its factorization.

79117061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297062.

The product of its (nonzero) digits is 2646, while the sum is 32.

The square root of 79117061 is about 8894.7771753991. Note that the first 3 decimals coincide. The cubic root of 79117061 is about 429.2958748461.

The spelling of 79117061 in words is "seventy-nine million, one hundred seventeen thousand, sixty-one".