4448898821 has 2 divisors, whose sum is σ = 4448898822. Its totient is φ = 4448898820.

The previous prime is 4448898799. The next prime is 4448898829. The reversal of 4448898821 is 1288988444.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2952292225 + 1496606596 = 54335^2 + 38686^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4448898821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4448898829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2224449410 + 2224449411.

It is an arithmetic number, because the mean of its divisors is an integer number (2224449411).

Almost surely, 2^4448898821 is an apocalyptic number.

It is an amenable number.

4448898821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4448898821 is an equidigital number, since it uses as much as digits as its factorization.

4448898821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4718592, while the sum is 56.

The square root of 4448898821 is about 66700.0661244050. The cubic root of 4448898821 is about 1644.6904713516.

The spelling of 4448898821 in words is "four billion, four hundred forty-eight million, eight hundred ninety-eight thousand, eight hundred twenty-one".