79111169 has 2 divisors, whose sum is σ = 79111170. Its totient is φ = 79111168.

The previous prime is 79111147. The next prime is 79111171. The reversal of 79111169 is 96111197.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74218225 + 4892944 = 8615^2 + 2212^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79111169 is a prime.

It is a super-2 number, since 2×79111169² = 12517154121093122, which contains 22 as substring.

Together with 79111171, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (79141169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39555584 + 39555585.

It is an arithmetic number, because the mean of its divisors is an integer number (39555585).

Almost surely, 2^79111169 is an apocalyptic number.

It is an amenable number.

79111169 is a deficient number, since it is larger than the sum of its proper divisors (1).

79111169 is an equidigital number, since it uses as much as digits as its factorization.

79111169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402, while the sum is 35.

The square root of 79111169 is about 8894.4459636337. The cubic root of 79111169 is about 429.2852177512.

The spelling of 79111169 in words is "seventy-nine million, one hundred eleven thousand, one hundred sixty-nine".