4504399621 has 2 divisors, whose sum is σ = 4504399622. Its totient is φ = 4504399620.

The previous prime is 4504399591. The next prime is 4504399631. The reversal of 4504399621 is 1269934054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3530023396 + 974376225 = 59414^2 + 31215^2 .

It is a cyclic number.

It is not a de Polignac number, because 4504399621 - 2²⁵ = 4470845189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4504399631) 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, 2252199810 + 2252199811.

It is an arithmetic number, because the mean of its divisors is an integer number (2252199811).

Almost surely, 2^4504399621 is an apocalyptic number.

It is an amenable number.

4504399621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4504399621 is an equidigital number, since it uses as much as digits as its factorization.

4504399621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 4504399621 is about 67114.8241523436. The cubic root of 4504399621 is about 1651.5014946933.

The spelling of 4504399621 in words is "four billion, five hundred four million, three hundred ninety-nine thousand, six hundred twenty-one".