4442649989 has 2 divisors, whose sum is σ = 4442649990. Its totient is φ = 4442649988.

The previous prime is 4442649971. The next prime is 4442650033. The reversal of 4442649989 is 9899462444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3478050625 + 964599364 = 58975^2 + 31058^2 .

It is a cyclic number.

It is not a de Polignac number, because 4442649989 - 2¹⁶ = 4442584453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4442649689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2221324994 + 2221324995.

It is an arithmetic number, because the mean of its divisors is an integer number (2221324995).

Almost surely, 2^4442649989 is an apocalyptic number.

It is an amenable number.

4442649989 is a deficient number, since it is larger than the sum of its proper divisors (1).

4442649989 is an equidigital number, since it uses as much as digits as its factorization.

4442649989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17915904, while the sum is 59.

The square root of 4442649989 is about 66653.2068920918. The cubic root of 4442649989 is about 1643.9200777159.

The spelling of 4442649989 in words is "four billion, four hundred forty-two million, six hundred forty-nine thousand, nine hundred eighty-nine".