4421999 has 2 divisors, whose sum is σ = 4422000. Its totient is φ = 4421998.

The previous prime is 4421987. The next prime is 4422017. The reversal of 4421999 is 9991244.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4421999 - 2⁸ = 4421743 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4421909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2210999 + 2211000.

It is an arithmetic number, because the mean of its divisors is an integer number (2211000).

Almost surely, 2^4421999 is an apocalyptic number.

4421999 is a deficient number, since it is larger than the sum of its proper divisors (1).

4421999 is an equidigital number, since it uses as much as digits as its factorization.

4421999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 4421999 is about 2102.8549640905. The cubic root of 4421999 is about 164.1368949193.

The spelling of 4421999 in words is "four million, four hundred twenty-one thousand, nine hundred ninety-nine".