79967911 has 4 divisors (see below), whose sum is σ = 79985800. Its totient is φ = 79950024.

The previous prime is 79967891. The next prime is 79967947. The reversal of 79967911 is 11976997.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 79967911 - 2⁹ = 79967399 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 (79967411) 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 3 ways as a sum of consecutive naturals, for example, 4225 + ... + 13333.

It is an arithmetic number, because the mean of its divisors is an integer number (19996450).

Almost surely, 2^79967911 is an apocalyptic number.

79967911 is a deficient number, since it is larger than the sum of its proper divisors (17889).

79967911 is an equidigital number, since it uses as much as digits as its factorization.

79967911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17888.

The product of its digits is 214326, while the sum is 49.

The square root of 79967911 is about 8942.4779004480. The cubic root of 79967911 is about 430.8293189228.

The spelling of 79967911 in words is "seventy-nine million, nine hundred sixty-seven thousand, nine hundred eleven".