4044370621 has 2 divisors, whose sum is σ = 4044370622. Its totient is φ = 4044370620.

The previous prime is 4044370619. The next prime is 4044370691. The reversal of 4044370621 is 1260734404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3045494596 + 998876025 = 55186^2 + 31605^2 .

It is a cyclic number.

It is not a de Polignac number, because 4044370621 - 2¹ = 4044370619 is a prime.

Together with 4044370619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4044370691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2022185310 + 2022185311.

It is an arithmetic number, because the mean of its divisors is an integer number (2022185311).

Almost surely, 2^4044370621 is an apocalyptic number.

It is an amenable number.

4044370621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4044370621 is an equidigital number, since it uses as much as digits as its factorization.

4044370621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 4044370621 is about 63595.3663485006. The cubic root of 4044370621 is about 1593.2489794991.

The spelling of 4044370621 in words is "four billion, forty-four million, three hundred seventy thousand, six hundred twenty-one".