4044400421 has 2 divisors, whose sum is σ = 4044400422. Its totient is φ = 4044400420.

The previous prime is 4044400411. The next prime is 4044400429. The reversal of 4044400421 is 1240044404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4043179396 + 1221025 = 63586^2 + 1105^2 .

It is a cyclic number.

It is not a de Polignac number, because 4044400421 - 2⁶ = 4044400357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4044400429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2022200210 + 2022200211.

It is an arithmetic number, because the mean of its divisors is an integer number (2022200211).

Almost surely, 2^4044400421 is an apocalyptic number.

It is an amenable number.

4044400421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4044400421 is an equidigital number, since it uses as much as digits as its factorization.

4044400421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 4044400421 is about 63595.6006418683. The cubic root of 4044400421 is about 1593.2528926504.

Adding to 4044400421 its reverse (1240044404), we get a palindrome (5284444825).

The spelling of 4044400421 in words is "four billion, forty-four million, four hundred thousand, four hundred twenty-one".