9449053721 has 2 divisors, whose sum is σ = 9449053722. Its totient is φ = 9449053720.

The previous prime is 9449053717. The next prime is 9449053769. The reversal of 9449053721 is 1273509449.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6548046400 + 2901007321 = 80920^2 + 53861^2 .

It is a cyclic number.

It is not a de Polignac number, because 9449053721 - 2² = 9449053717 is a prime.

It is not a weakly prime, because it can be changed into another prime (9449053421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4724526860 + 4724526861.

It is an arithmetic number, because the mean of its divisors is an integer number (4724526861).

Almost surely, 2^9449053721 is an apocalyptic number.

It is an amenable number.

9449053721 is a deficient number, since it is larger than the sum of its proper divisors (1).

9449053721 is an equidigital number, since it uses as much as digits as its factorization.

9449053721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 9449053721 is about 97206.2432202788. The cubic root of 9449053721 is about 2114.1190488957.

The spelling of 9449053721 in words is "nine billion, four hundred forty-nine million, fifty-three thousand, seven hundred twenty-one".