18089117 has 2 divisors, whose sum is σ = 18089118. Its totient is φ = 18089116.

The previous prime is 18089081. The next prime is 18089119. The reversal of 18089117 is 71198081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16859236 + 1229881 = 4106^2 + 1109^2 .

It is a cyclic number.

It is not a de Polignac number, because 18089117 - 2¹⁶ = 18023581 is a prime.

Together with 18089119, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18089119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9044558 + 9044559.

It is an arithmetic number, because the mean of its divisors is an integer number (9044559).

Almost surely, 2^18089117 is an apocalyptic number.

It is an amenable number.

18089117 is a deficient number, since it is larger than the sum of its proper divisors (1).

18089117 is an equidigital number, since it uses as much as digits as its factorization.

18089117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 35.

The square root of 18089117 is about 4253.1302589975. The cubic root of 18089117 is about 262.5059324434.

The spelling of 18089117 in words is "eighteen million, eighty-nine thousand, one hundred seventeen".