18000797 has 2 divisors, whose sum is σ = 18000798. Its totient is φ = 18000796.

The previous prime is 18000779. The next prime is 18000803. The reversal of 18000797 is 79700081.

Together with previous prime (18000779) 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., 13586596 + 4414201 = 3686^2 + 2101^2 .

It is an emirp because it is prime and its reverse (79700081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18000797 - 2¹⁸ = 17738653 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18000727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9000398 + 9000399.

It is an arithmetic number, because the mean of its divisors is an integer number (9000399).

Almost surely, 2^18000797 is an apocalyptic number.

It is an amenable number.

18000797 is a deficient number, since it is larger than the sum of its proper divisors (1).

18000797 is an equidigital number, since it uses as much as digits as its factorization.

18000797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 32.

The square root of 18000797 is about 4242.7346134304. The cubic root of 18000797 is about 262.0780073840.

The spelling of 18000797 in words is "eighteen million, seven hundred ninety-seven", and thus it is an aban number.