4457721313 has 2 divisors, whose sum is σ = 4457721314. Its totient is φ = 4457721312.

The previous prime is 4457721311. The next prime is 4457721383. The reversal of 4457721313 is 3131277544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4436625664 + 21095649 = 66608^2 + 4593^2 .

It is a cyclic number.

It is not a de Polignac number, because 4457721313 - 2¹ = 4457721311 is a prime.

Together with 4457721311, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4457721311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2228860656 + 2228860657.

It is an arithmetic number, because the mean of its divisors is an integer number (2228860657).

Almost surely, 2^4457721313 is an apocalyptic number.

It is an amenable number.

4457721313 is a deficient number, since it is larger than the sum of its proper divisors (1).

4457721313 is an equidigital number, since it uses as much as digits as its factorization.

4457721313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 37.

The square root of 4457721313 is about 66766.1689255869. The cubic root of 4457721313 is about 1645.7769340188.

Adding to 4457721313 its reverse (3131277544), we get a palindrome (7588998857).

The spelling of 4457721313 in words is "four billion, four hundred fifty-seven million, seven hundred twenty-one thousand, three hundred thirteen".