4394021999 has 2 divisors, whose sum is σ = 4394022000. Its totient is φ = 4394021998.

The previous prime is 4394021941. The next prime is 4394022007. The reversal of 4394021999 is 9991204934.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4394021999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4394021899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2197010999 + 2197011000.

It is an arithmetic number, because the mean of its divisors is an integer number (2197011000).

Almost surely, 2^4394021999 is an apocalyptic number.

4394021999 is a deficient number, since it is larger than the sum of its proper divisors (1).

4394021999 is an equidigital number, since it uses as much as digits as its factorization.

4394021999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 629856, while the sum is 50.

The square root of 4394021999 is about 66287.4196133776. The cubic root of 4394021999 is about 1637.9000982910.

The spelling of 4394021999 in words is "four billion, three hundred ninety-four million, twenty-one thousand, nine hundred ninety-nine".