18368249 has 2 divisors, whose sum is σ = 18368250. Its totient is φ = 18368248.

The previous prime is 18368239. The next prime is 18368261. The reversal of 18368249 is 94286381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13987600 + 4380649 = 3740^2 + 2093^2 .

It is a cyclic number.

It is not a de Polignac number, because 18368249 - 2²⁴ = 1591033 is a prime.

It is not a weakly prime, because it can be changed into another prime (18368239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9184124 + 9184125.

It is an arithmetic number, because the mean of its divisors is an integer number (9184125).

Almost surely, 2^18368249 is an apocalyptic number.

It is an amenable number.

18368249 is a deficient number, since it is larger than the sum of its proper divisors (1).

18368249 is an equidigital number, since it uses as much as digits as its factorization.

18368249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 41.

The square root of 18368249 is about 4285.8195248984. The cubic root of 18368249 is about 263.8492836165.

The spelling of 18368249 in words is "eighteen million, three hundred sixty-eight thousand, two hundred forty-nine".