18092489 has 2 divisors, whose sum is σ = 18092490. Its totient is φ = 18092488.

The previous prime is 18092461. The next prime is 18092497. The reversal of 18092489 is 98429081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17808400 + 284089 = 4220^2 + 533^2 .

It is an emirp because it is prime and its reverse (98429081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18092489 - 2²⁰ = 17043913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18092419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9046244 + 9046245.

It is an arithmetic number, because the mean of its divisors is an integer number (9046245).

Almost surely, 2^18092489 is an apocalyptic number.

It is an amenable number.

18092489 is a deficient number, since it is larger than the sum of its proper divisors (1).

18092489 is an equidigital number, since it uses as much as digits as its factorization.

18092489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 18092489 is about 4253.5266544363. The cubic root of 18092489 is about 262.5222427108.

It can be divided in two parts, 18092 and 489, that added together give a palindrome (18581).

The spelling of 18092489 in words is "eighteen million, ninety-two thousand, four hundred eighty-nine".