4343040421 has 2 divisors, whose sum is σ = 4343040422. Its totient is φ = 4343040420.

The previous prime is 4343040413. The next prime is 4343040451. The reversal of 4343040421 is 1240403434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4228250625 + 114789796 = 65025^2 + 10714^2 .

It is a cyclic number.

It is not a de Polignac number, because 4343040421 - 2³ = 4343040413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4343040451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2171520210 + 2171520211.

It is an arithmetic number, because the mean of its divisors is an integer number (2171520211).

Almost surely, 2^4343040421 is an apocalyptic number.

It is an amenable number.

4343040421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4343040421 is an equidigital number, since it uses as much as digits as its factorization.

4343040421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 4343040421 is about 65901.7482393297. The cubic root of 4343040421 is about 1631.5408693240.

Adding to 4343040421 its reverse (1240403434), we get a palindrome (5583443855).

The spelling of 4343040421 in words is "four billion, three hundred forty-three million, forty thousand, four hundred twenty-one".