4218089 has 4 divisors (see below), whose sum is σ = 4287300. Its totient is φ = 4148880.

The previous prime is 4218061. The next prime is 4218103. The reversal of 4218089 is 9808124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 672400 + 3545689 = 820^2 + 1883^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4218089 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4218289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34514 + ... + 34635.

It is an arithmetic number, because the mean of its divisors is an integer number (1071825).

Almost surely, 2^4218089 is an apocalyptic number.

It is an amenable number.

4218089 is a deficient number, since it is larger than the sum of its proper divisors (69211).

4218089 is an equidigital number, since it uses as much as digits as its factorization.

4218089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69210.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 4218089 is about 2053.7986756252. The cubic root of 4218089 is about 161.5741623111.

It can be divided in two parts, 4 and 218089, that multiplied together give a square (872356 = 934²).

The spelling of 4218089 in words is "four million, two hundred eighteen thousand, eighty-nine".