18288313 has 2 divisors, whose sum is σ = 18288314. Its totient is φ = 18288312.

The previous prime is 18288293. The next prime is 18288329. The reversal of 18288313 is 31388281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16867449 + 1420864 = 4107^2 + 1192^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18288313 is a prime.

It is not a weakly prime, because it can be changed into another prime (18288353) 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, 9144156 + 9144157.

It is an arithmetic number, because the mean of its divisors is an integer number (9144157).

Almost surely, 2^18288313 is an apocalyptic number.

It is an amenable number.

18288313 is a deficient number, since it is larger than the sum of its proper divisors (1).

18288313 is an equidigital number, since it uses as much as digits as its factorization.

18288313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 34.

The square root of 18288313 is about 4276.4837191319. The cubic root of 18288313 is about 263.4659822358.

The spelling of 18288313 in words is "eighteen million, two hundred eighty-eight thousand, three hundred thirteen".