79539228729 has 9 divisors (see below), whose sum is σ = 114891219183. Its totient is φ = 53025588432.

The previous prime is 79539228721. The next prime is 79539228761. The reversal of 79539228729 is 92782293597.

The square root of 79539228729 is 282027.

It is a perfect power (a square), and thus also a powerful number.

79539228729 is a `hidden beast` number, since 7 + 9 + 539 + 2 + 28 + 72 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 892635129 + 78646593600 = 29877^2 + 280440^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 79539228729 - 2³ = 79539228721 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (79539228721) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 799077 + ... + 893085.

Almost surely, 2^79539228729 is an apocalyptic number.

79539228729 is the 282027-th square number.

79539228729 is the 141014-th centered octagonal number.

It is an amenable number.

79539228729 is a deficient number, since it is larger than the sum of its proper divisors (35351990454).

79539228729 is an frugal number, since it uses more digits than its factorization.

79539228729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188024 (or 94012 counting only the distinct ones).

The product of its digits is 34292160, while the sum is 63.

The spelling of 79539228729 in words is "seventy-nine billion, five hundred thirty-nine million, two hundred twenty-eight thousand, seven hundred twenty-nine".