18097637 has 2 divisors, whose sum is σ = 18097638. Its totient is φ = 18097636.

The previous prime is 18097621. The next prime is 18097669. The reversal of 18097637 is 73679081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17986081 + 111556 = 4241^2 + 334^2 .

It is a cyclic number.

It is not a de Polignac number, because 18097637 - 2⁴ = 18097621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18097594 and 18097603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18097697) 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, 9048818 + 9048819.

It is an arithmetic number, because the mean of its divisors is an integer number (9048819).

Almost surely, 2^18097637 is an apocalyptic number.

It is an amenable number.

18097637 is a deficient number, since it is larger than the sum of its proper divisors (1).

18097637 is an equidigital number, since it uses as much as digits as its factorization.

18097637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 18097637 is about 4254.1317563047. The cubic root of 18097637 is about 262.5471395312.

The spelling of 18097637 in words is "eighteen million, ninety-seven thousand, six hundred thirty-seven".