4378243 has 2 divisors, whose sum is σ = 4378244. Its totient is φ = 4378242.

The previous prime is 4378237. The next prime is 4378271. The reversal of 4378243 is 3428734.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4378243 is a prime.

It is a d-powerful number, because it can be written as 4⁸ + 3² + 7⁶ + 8 + 2³ + 4¹¹ + 3⁶ .

It is not a weakly prime, because it can be changed into another prime (4378273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2189121 + 2189122.

It is an arithmetic number, because the mean of its divisors is an integer number (2189122).

Almost surely, 2^4378243 is an apocalyptic number.

4378243 is a deficient number, since it is larger than the sum of its proper divisors (1).

4378243 is an equidigital number, since it uses as much as digits as its factorization.

4378243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 31.

The square root of 4378243 is about 2092.4251480041. The cubic root of 4378243 is about 163.5937172162.

The spelling of 4378243 in words is "four million, three hundred seventy-eight thousand, two hundred forty-three".