79427717 has 4 divisors (see below), whose sum is σ = 82881120. Its totient is φ = 75974316.

The previous prime is 79427707. The next prime is 79427737. The reversal of 79427717 is 71772497.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 79427717 - 2⁶ = 79427653 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 (79427707) 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, 1726667 + ... + 1726712.

It is an arithmetic number, because the mean of its divisors is an integer number (20720280).

Almost surely, 2^79427717 is an apocalyptic number.

It is an amenable number.

79427717 is a deficient number, since it is larger than the sum of its proper divisors (3453403).

79427717 is a wasteful number, since it uses less digits than its factorization.

79427717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3453402.

The product of its digits is 172872, while the sum is 44.

The square root of 79427717 is about 8912.2228989181. Note that the first 3 decimals coincide. The cubic root of 79427717 is about 429.8570229533.

The spelling of 79427717 in words is "seventy-nine million, four hundred twenty-seven thousand, seven hundred seventeen".