79206784969 has 9 divisors (see below), whose sum is σ = 85772255733. Its totient is φ = 73110578112.

The previous prime is 79206784913. The next prime is 79206784981. The reversal of 79206784969 is 96948760297.

The square root of 79206784969 is 281437.

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

It can be written as a sum of positive squares in 4 ways, for example, as 19579005625 + 59627779344 = 139925^2 + 244188^2 .

It is not a de Polignac number, because 79206784969 - 2⁹ = 79206784457 is a prime.

It is a super-3 number, since 3×79206784969³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79206784369) 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, 3647857 + ... + 3669505.

It is an arithmetic number, because the mean of its divisors is an integer number (9530250637).

Almost surely, 2^79206784969 is an apocalyptic number.

79206784969 is the 281437-th square number.

79206784969 is the 140719-th centered octagonal number.

It is an amenable number.

79206784969 is a deficient number, since it is larger than the sum of its proper divisors (6565470764).

79206784969 is an frugal number, since it uses more digits than its factorization.

79206784969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43324 (or 21662 counting only the distinct ones).

The product of its (nonzero) digits is 82301184, while the sum is 67.

The spelling of 79206784969 in words is "seventy-nine billion, two hundred six million, seven hundred eighty-four thousand, nine hundred sixty-nine".