7444444421 has 2 divisors, whose sum is σ = 7444444422. Its totient is φ = 7444444420.

The previous prime is 7444444409. The next prime is 7444444433. The reversal of 7444444421 is 1244444447.

It is a balanced prime because it is at equal distance from previous prime (7444444409) and next prime (7444444433).

It can be written as a sum of positive squares in only one way, i.e., 7398408196 + 46036225 = 86014^2 + 6785^2 .

It is a cyclic number.

It is not a de Polignac number, because 7444444421 - 2²⁶ = 7377335557 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7444444621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3722222210 + 3722222211.

It is an arithmetic number, because the mean of its divisors is an integer number (3722222211).

Almost surely, 2^7444444421 is an apocalyptic number.

It is an amenable number.

7444444421 is a deficient number, since it is larger than the sum of its proper divisors (1).

7444444421 is an equidigital number, since it uses as much as digits as its factorization.

7444444421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 229376, while the sum is 38.

The square root of 7444444421 is about 86281.1939011045. The cubic root of 7444444421 is about 1952.5886655005.

Adding to 7444444421 its reverse (1244444447), we get a palindrome (8688888868).

The spelling of 7444444421 in words is "seven billion, four hundred forty-four million, four hundred forty-four thousand, four hundred twenty-one".