79084561 has 8 divisors (see below), whose sum is σ = 84031560. Its totient is φ = 74427904.

The previous prime is 79084543. The next prime is 79084571. The reversal of 79084561 is 16548097.

It can be written as a sum of positive squares in 4 ways, for example, as 16974400 + 62110161 = 4120^2 + 7881^2 .

It is not a de Polignac number, because 79084561 - 2⁵ = 79084529 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79084541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3136 + ... + 12961.

It is an arithmetic number, because the mean of its divisors is an integer number (10503945).

Almost surely, 2^79084561 is an apocalyptic number.

It is an amenable number.

79084561 is a deficient number, since it is larger than the sum of its proper divisors (4946999).

79084561 is an equidigital number, since it uses as much as digits as its factorization.

79084561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16148 (or 16114 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 79084561 is about 8892.9500729510. The cubic root of 79084561 is about 429.2370842109.

Subtracting from 79084561 its reverse (16548097), we obtain a square (62536464 = 7908²).

The spelling of 79084561 in words is "seventy-nine million, eighty-four thousand, five hundred sixty-one".