4430401421 has 2 divisors, whose sum is σ = 4430401422. Its totient is φ = 4430401420.

The previous prime is 4430401403. The next prime is 4430401471. The reversal of 4430401421 is 1241040344.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2616834025 + 1813567396 = 51155^2 + 42586^2 .

It is a cyclic number.

It is not a de Polignac number, because 4430401421 - 2²² = 4426207117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4430401471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2215200710 + 2215200711.

It is an arithmetic number, because the mean of its divisors is an integer number (2215200711).

Almost surely, 2^4430401421 is an apocalyptic number.

It is an amenable number.

4430401421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4430401421 is an equidigital number, since it uses as much as digits as its factorization.

4430401421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 4430401421 is about 66561.2606626407. The cubic root of 4430401421 is about 1642.4079021558.

Adding to 4430401421 its reverse (1241040344), we get a palindrome (5671441765).

The spelling of 4430401421 in words is "four billion, four hundred thirty million, four hundred one thousand, four hundred twenty-one".