4218791 has 2 divisors, whose sum is σ = 4218792. Its totient is φ = 4218790.

The previous prime is 4218763. The next prime is 4218793. The reversal of 4218791 is 1978124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4218791 - 2¹⁸ = 3956647 is a prime.

Together with 4218793, 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 (4218793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2109395 + 2109396.

It is an arithmetic number, because the mean of its divisors is an integer number (2109396).

Almost surely, 2^4218791 is an apocalyptic number.

4218791 is a deficient number, since it is larger than the sum of its proper divisors (1).

4218791 is an equidigital number, since it uses as much as digits as its factorization.

4218791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 32.

The square root of 4218791 is about 2053.9695713423. The cubic root of 4218791 is about 161.5831251985.

The spelling of 4218791 in words is "four million, two hundred eighteen thousand, seven hundred ninety-one".