18268697 has 2 divisors, whose sum is σ = 18268698. Its totient is φ = 18268696.

The previous prime is 18268687. The next prime is 18268699. The reversal of 18268697 is 79686281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12222016 + 6046681 = 3496^2 + 2459^2 .

It is an emirp because it is prime and its reverse (79686281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18268697 - 2⁸ = 18268441 is a prime.

Together with 18268699, 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 (18268699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9134348 + 9134349.

It is an arithmetic number, because the mean of its divisors is an integer number (9134349).

Almost surely, 2^18268697 is an apocalyptic number.

It is an amenable number.

18268697 is a deficient number, since it is larger than the sum of its proper divisors (1).

18268697 is an equidigital number, since it uses as much as digits as its factorization.

18268697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 47.

The square root of 18268697 is about 4274.1896307955. The cubic root of 18268697 is about 263.3717508799.

The spelling of 18268697 in words is "eighteen million, two hundred sixty-eight thousand, six hundred ninety-seven".