18074897 has 2 divisors, whose sum is σ = 18074898. Its totient is φ = 18074896.

The previous prime is 18074879. The next prime is 18074899. The reversal of 18074897 is 79847081.

Together with previous prime (18074879) 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., 15085456 + 2989441 = 3884^2 + 1729^2 .

It is a cyclic number.

It is not a de Polignac number, because 18074897 - 2²² = 13880593 is a prime.

Together with 18074899, 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 (18074899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9037448 + 9037449.

It is an arithmetic number, because the mean of its divisors is an integer number (9037449).

Almost surely, 2^18074897 is an apocalyptic number.

18074897 is the 2273-rd centered heptagonal number.

It is an amenable number.

18074897 is a deficient number, since it is larger than the sum of its proper divisors (1).

18074897 is an equidigital number, since it uses as much as digits as its factorization.

18074897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 18074897 is about 4251.4582204227. The cubic root of 18074897 is about 262.4371284046.

The spelling of 18074897 in words is "eighteen million, seventy-four thousand, eight hundred ninety-seven".