79292929217 has 4 divisors (see below), whose sum is σ = 81435981396. Its totient is φ = 77149877040.

The previous prime is 79292929213. The next prime is 79292929229. The reversal of 79292929217 is 71292929297.

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 29349171856 + 49943757361 = 171316^2 + 223481^2 .

It is a cyclic number.

It is not a de Polignac number, because 79292929217 - 2² = 79292929213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79292929211) 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, 1071526034 + ... + 1071526107.

It is an arithmetic number, because the mean of its divisors is an integer number (20358995349).

Almost surely, 2^79292929217 is an apocalyptic number.

It is an amenable number.

79292929217 is a deficient number, since it is larger than the sum of its proper divisors (2143052179).

79292929217 is a wasteful number, since it uses less digits than its factorization.

79292929217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2143052178.

The product of its digits is 5143824, while the sum is 59.

The spelling of 79292929217 in words is "seventy-nine billion, two hundred ninety-two million, nine hundred twenty-nine thousand, two hundred seventeen".