4449889993 has 2 divisors, whose sum is σ = 4449889994. Its totient is φ = 4449889992.

The previous prime is 4449889991. The next prime is 4449890077. The reversal of 4449889993 is 3999889444.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2374905289 + 2074984704 = 48733^2 + 45552^2 .

It is a cyclic number.

It is not a de Polignac number, because 4449889993 - 2¹ = 4449889991 is a prime.

Together with 4449889991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4449889991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2224944996 + 2224944997.

It is an arithmetic number, because the mean of its divisors is an integer number (2224944997).

Almost surely, 2^4449889993 is an apocalyptic number.

It is an amenable number.

4449889993 is a deficient number, since it is larger than the sum of its proper divisors (1).

4449889993 is an equidigital number, since it uses as much as digits as its factorization.

4449889993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80621568, while the sum is 67.

The square root of 4449889993 is about 66707.4957782107. The cubic root of 4449889993 is about 1644.8126027045.

The spelling of 4449889993 in words is "four billion, four hundred forty-nine million, eight hundred eighty-nine thousand, nine hundred ninety-three".