4518389 has 2 divisors, whose sum is σ = 4518390. Its totient is φ = 4518388.

The previous prime is 4518347. The next prime is 4518391. The reversal of 4518389 is 9838154.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2464900 + 2053489 = 1570^2 + 1433^2 .

It is a cyclic number.

It is not a de Polignac number, because 4518389 - 2⁸ = 4518133 is a prime.

Together with 4518391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4518989) 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, 2259194 + 2259195.

It is an arithmetic number, because the mean of its divisors is an integer number (2259195).

Almost surely, 2^4518389 is an apocalyptic number.

It is an amenable number.

4518389 is a deficient number, since it is larger than the sum of its proper divisors (1).

4518389 is an equidigital number, since it uses as much as digits as its factorization.

4518389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 38.

The square root of 4518389 is about 2125.6502534519. The cubic root of 4518389 is about 165.3209425150.

The spelling of 4518389 in words is "four million, five hundred eighteen thousand, three hundred eighty-nine".