4218947 has 2 divisors, whose sum is σ = 4218948. Its totient is φ = 4218946.

The previous prime is 4218917. The next prime is 4218961. The reversal of 4218947 is 7498124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4218947 - 2¹⁰ = 4217923 is a prime.

It is a d-powerful number, because it can be written as 4⁷ + 2¹³ + 1 + 8 + 9 + 4¹¹ + 7² .

It is not a weakly prime, because it can be changed into another prime (4218917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2109473 + 2109474.

It is an arithmetic number, because the mean of its divisors is an integer number (2109474).

Almost surely, 2^4218947 is an apocalyptic number.

4218947 is a deficient number, since it is larger than the sum of its proper divisors (1).

4218947 is an equidigital number, since it uses as much as digits as its factorization.

4218947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 35.

The square root of 4218947 is about 2054.0075462374. The cubic root of 4218947 is about 161.5851168163.

The spelling of 4218947 in words is "four million, two hundred eighteen thousand, nine hundred forty-seven".