79768517 has 4 divisors (see below), whose sum is σ = 83966880. Its totient is φ = 75570156.

The previous prime is 79768511. The next prime is 79768523. The reversal of 79768517 is 71586797.

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 an interprime number because it is at equal distance from previous prime (79768511) and next prime (79768523).

It is a cyclic number.

It is not a de Polignac number, because 79768517 - 2⁴ = 79768501 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 (79768511) 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, 2099153 + ... + 2099190.

It is an arithmetic number, because the mean of its divisors is an integer number (20991720).

Almost surely, 2^79768517 is an apocalyptic number.

It is an amenable number.

79768517 is a deficient number, since it is larger than the sum of its proper divisors (4198363).

79768517 is a wasteful number, since it uses less digits than its factorization.

79768517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4198362.

The product of its digits is 740880, while the sum is 50.

The square root of 79768517 is about 8931.3222425350. The cubic root of 79768517 is about 430.4709406756.

The spelling of 79768517 in words is "seventy-nine million, seven hundred sixty-eight thousand, five hundred seventeen".