4394218247 has 2 divisors, whose sum is σ = 4394218248. Its totient is φ = 4394218246.

The previous prime is 4394218237. The next prime is 4394218253. The reversal of 4394218247 is 7428124934.

4394218247 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4394218247 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4394218198 and 4394218207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4394218237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2197109123 + 2197109124.

It is an arithmetic number, because the mean of its divisors is an integer number (2197109124).

Almost surely, 2^4394218247 is an apocalyptic number.

4394218247 is a deficient number, since it is larger than the sum of its proper divisors (1).

4394218247 is an equidigital number, since it uses as much as digits as its factorization.

4394218247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 44.

The square root of 4394218247 is about 66288.8998777322. The cubic root of 4394218247 is about 1637.9244821648.

The spelling of 4394218247 in words is "four billion, three hundred ninety-four million, two hundred eighteen thousand, two hundred forty-seven".