7404445021 has 2 divisors, whose sum is σ = 7404445022. Its totient is φ = 7404445020.

The previous prime is 7404444997. The next prime is 7404445033. The reversal of 7404445021 is 1205444047.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7146842521 + 257602500 = 84539^2 + 16050^2 .

It is an emirp because it is prime and its reverse (1205444047) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7404445021 - 2¹⁷ = 7404313949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7404445091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3702222510 + 3702222511.

It is an arithmetic number, because the mean of its divisors is an integer number (3702222511).

Almost surely, 2^7404445021 is an apocalyptic number.

It is an amenable number.

7404445021 is a deficient number, since it is larger than the sum of its proper divisors (1).

7404445021 is an equidigital number, since it uses as much as digits as its factorization.

7404445021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17920, while the sum is 31.

The square root of 7404445021 is about 86049.0849515554. The cubic root of 7404445021 is about 1949.0852620473.

Adding to 7404445021 its reverse (1205444047), we get a palindrome (8609889068).

The spelling of 7404445021 in words is "seven billion, four hundred four million, four hundred forty-five thousand, twenty-one".