79812605 has 4 divisors (see below), whose sum is σ = 95775132. Its totient is φ = 63850080.

The previous prime is 79812587. The next prime is 79812617. The reversal of 79812605 is 50621897.

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 31967716 + 47844889 = 5654^2 + 6917^2 .

It is not a de Polignac number, because 79812605 - 2²⁶ = 12703741 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7981256 + ... + 7981265.

It is an arithmetic number, because the mean of its divisors is an integer number (23943783).

Almost surely, 2^79812605 is an apocalyptic number.

It is an amenable number.

79812605 is a deficient number, since it is larger than the sum of its proper divisors (15962527).

79812605 is a wasteful number, since it uses less digits than its factorization.

79812605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15962526.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 79812605 is about 8933.7900691700. The cubic root of 79812605 is about 430.5502330586.

The spelling of 79812605 in words is "seventy-nine million, eight hundred twelve thousand, six hundred five".