18116597 has 2 divisors, whose sum is σ = 18116598. Its totient is φ = 18116596.

The previous prime is 18116591. The next prime is 18116653. The reversal of 18116597 is 79561181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17757796 + 358801 = 4214^2 + 599^2 .

It is a cyclic number.

It is not a de Polignac number, because 18116597 - 2⁶ = 18116533 is a prime.

It is a super-2 number, since 2×18116597² = 656422173720818, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18116597.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18116591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9058298 + 9058299.

It is an arithmetic number, because the mean of its divisors is an integer number (9058299).

Almost surely, 2^18116597 is an apocalyptic number.

It is an amenable number.

18116597 is a deficient number, since it is larger than the sum of its proper divisors (1).

18116597 is an equidigital number, since it uses as much as digits as its factorization.

18116597 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 38.

The square root of 18116597 is about 4256.3595947711. The cubic root of 18116597 is about 262.6387934197.

The spelling of 18116597 in words is "eighteen million, one hundred sixteen thousand, five hundred ninety-seven".