18600089 has 2 divisors, whose sum is σ = 18600090. Its totient is φ = 18600088.

The previous prime is 18600073. The next prime is 18600097. The reversal of 18600089 is 98000681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15054400 + 3545689 = 3880^2 + 1883^2 .

It is a cyclic number.

It is not a de Polignac number, because 18600089 - 2⁴ = 18600073 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18606089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9300044 + 9300045.

It is an arithmetic number, because the mean of its divisors is an integer number (9300045).

Almost surely, 2^18600089 is an apocalyptic number.

It is an amenable number.

18600089 is a deficient number, since it is larger than the sum of its proper divisors (1).

18600089 is an equidigital number, since it uses as much as digits as its factorization.

18600089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 18600089 is about 4312.7820487477. The cubic root of 18600089 is about 264.9547282341.

The spelling of 18600089 in words is "eighteen million, six hundred thousand, eighty-nine".