18119117 has 2 divisors, whose sum is σ = 18119118. Its totient is φ = 18119116.

The previous prime is 18119107. The next prime is 18119177. The reversal of 18119117 is 71191181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18028516 + 90601 = 4246^2 + 301^2 .

It is an emirp because it is prime and its reverse (71191181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18119117 - 2⁸ = 18118861 is a prime.

It is a Chen prime.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 18119117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18119107) 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 as a sum of consecutive naturals, namely, 9059558 + 9059559.

It is an arithmetic number, because the mean of its divisors is an integer number (9059559).

Almost surely, 2^18119117 is an apocalyptic number.

It is an amenable number.

18119117 is a deficient number, since it is larger than the sum of its proper divisors (1).

18119117 is an equidigital number, since it uses as much as digits as its factorization.

18119117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 29.

The square root of 18119117 is about 4256.6556120974. The cubic root of 18119117 is about 262.6509704504.

It can be divided in two parts, 1 and 8119117, that added together give a palindrome (8119118).

The spelling of 18119117 in words is "eighteen million, one hundred nineteen thousand, one hundred seventeen".