79775727 has 4 divisors (see below), whose sum is σ = 106367640. Its totient is φ = 53183816.

The previous prime is 79775693. The next prime is 79775767. The reversal of 79775727 is 72757797.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79775727 - 2⁷ = 79775599 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79775727.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79775767) 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, 13295952 + ... + 13295957.

It is an arithmetic number, because the mean of its divisors is an integer number (26591910).

Almost surely, 2^79775727 is an apocalyptic number.

79775727 is a deficient number, since it is larger than the sum of its proper divisors (26591913).

79775727 is a wasteful number, since it uses less digits than its factorization.

79775727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26591912.

The product of its digits is 1512630, while the sum is 51.

The square root of 79775727 is about 8931.7258690580. The cubic root of 79775727 is about 430.4839098774.

The spelling of 79775727 in words is "seventy-nine million, seven hundred seventy-five thousand, seven hundred twenty-seven".