6424444121 has 2 divisors, whose sum is σ = 6424444122. Its totient is φ = 6424444120.

The previous prime is 6424444079. The next prime is 6424444219. The reversal of 6424444121 is 1214444246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5559790096 + 864654025 = 74564^2 + 29405^2 .

It is a cyclic number.

It is not a de Polignac number, because 6424444121 - 2¹⁰ = 6424443097 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6424444921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3212222060 + 3212222061.

It is an arithmetic number, because the mean of its divisors is an integer number (3212222061).

Almost surely, 2^6424444121 is an apocalyptic number.

It is an amenable number.

6424444121 is a deficient number, since it is larger than the sum of its proper divisors (1).

6424444121 is an equidigital number, since it uses as much as digits as its factorization.

6424444121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24576, while the sum is 32.

The square root of 6424444121 is about 80152.6301564708. The cubic root of 6424444121 is about 1858.9962712762.

Adding to 6424444121 its reverse (1214444246), we get a palindrome (7638888367).

The spelling of 6424444121 in words is "six billion, four hundred twenty-four million, four hundred forty-four thousand, one hundred twenty-one".