18027697 has 2 divisors, whose sum is σ = 18027698. Its totient is φ = 18027696.

The previous prime is 18027679. The next prime is 18027727. The reversal of 18027697 is 79672081.

Together with previous prime (18027679) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17986081 + 41616 = 4241^2 + 204^2 .

It is a cyclic number.

It is not a de Polignac number, because 18027697 - 2¹¹ = 18025649 is a prime.

It is not a weakly prime, because it can be changed into another prime (18027677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9013848 + 9013849.

It is an arithmetic number, because the mean of its divisors is an integer number (9013849).

Almost surely, 2^18027697 is an apocalyptic number.

It is an amenable number.

18027697 is a deficient number, since it is larger than the sum of its proper divisors (1).

18027697 is an equidigital number, since it uses as much as digits as its factorization.

18027697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 18027697 is about 4245.9035551929. The cubic root of 18027697 is about 262.2084903023.

The spelling of 18027697 in words is "eighteen million, twenty-seven thousand, six hundred ninety-seven".