18098161 has 2 divisors, whose sum is σ = 18098162. Its totient is φ = 18098160.

The previous prime is 18098147. The next prime is 18098167. The reversal of 18098161 is 16189081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14745600 + 3352561 = 3840^2 + 1831^2 .

It is an emirp because it is prime and its reverse (16189081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18098161 - 2¹³ = 18089969 is a prime.

It is not a weakly prime, because it can be changed into another prime (18098167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9049080 + 9049081.

It is an arithmetic number, because the mean of its divisors is an integer number (9049081).

Almost surely, 2^18098161 is an apocalyptic number.

It is an amenable number.

18098161 is a deficient number, since it is larger than the sum of its proper divisors (1).

18098161 is an equidigital number, since it uses as much as digits as its factorization.

18098161 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 34.

The square root of 18098161 is about 4254.1933430440. The cubic root of 18098161 is about 262.5496734416.

The spelling of 18098161 in words is "eighteen million, ninety-eight thousand, one hundred sixty-one".