18238097 has 2 divisors, whose sum is σ = 18238098. Its totient is φ = 18238096.

The previous prime is 18238079. The next prime is 18238109. The reversal of 18238097 is 79083281.

Together with previous prime (18238079) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11498881 + 6739216 = 3391^2 + 2596^2 .

It is a cyclic number.

It is not a de Polignac number, because 18238097 - 2¹² = 18234001 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18238097.

It is not a weakly prime, because it can be changed into another prime (18238007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9119048 + 9119049.

It is an arithmetic number, because the mean of its divisors is an integer number (9119049).

Almost surely, 2^18238097 is an apocalyptic number.

It is an amenable number.

18238097 is a deficient number, since it is larger than the sum of its proper divisors (1).

18238097 is an equidigital number, since it uses as much as digits as its factorization.

18238097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 18238097 is about 4270.6085046513. The cubic root of 18238097 is about 263.2246197980.

The spelling of 18238097 in words is "eighteen million, two hundred thirty-eight thousand, ninety-seven".