4421043857 has 2 divisors, whose sum is σ = 4421043858. Its totient is φ = 4421043856.

The previous prime is 4421043853. The next prime is 4421043883. The reversal of 4421043857 is 7583401244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4419058576 + 1985281 = 66476^2 + 1409^2 .

It is a cyclic number.

It is not a de Polignac number, because 4421043857 - 2² = 4421043853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4421043857.

It is not a weakly prime, because it can be changed into another prime (4421043853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2210521928 + 2210521929.

It is an arithmetic number, because the mean of its divisors is an integer number (2210521929).

Almost surely, 2^4421043857 is an apocalyptic number.

It is an amenable number.

4421043857 is a deficient number, since it is larger than the sum of its proper divisors (1).

4421043857 is an equidigital number, since it uses as much as digits as its factorization.

4421043857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107520, while the sum is 38.

The square root of 4421043857 is about 66490.9306371929. The cubic root of 4421043857 is about 1641.2507632056.

The spelling of 4421043857 in words is "four billion, four hundred twenty-one million, forty-three thousand, eight hundred fifty-seven".