18297143 has 2 divisors, whose sum is σ = 18297144. Its totient is φ = 18297142.

The previous prime is 18297131. The next prime is 18297179. The reversal of 18297143 is 34179281.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18297143 - 2⁴ = 18297127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18297113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9148571 + 9148572.

It is an arithmetic number, because the mean of its divisors is an integer number (9148572).

Almost surely, 2^18297143 is an apocalyptic number.

18297143 is a deficient number, since it is larger than the sum of its proper divisors (1).

18297143 is an equidigital number, since it uses as much as digits as its factorization.

18297143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 35.

The square root of 18297143 is about 4277.5159847743. The cubic root of 18297143 is about 263.5083778048.

The spelling of 18297143 in words is "eighteen million, two hundred ninety-seven thousand, one hundred forty-three".