4340343421 has 2 divisors, whose sum is σ = 4340343422. Its totient is φ = 4340343420.

The previous prime is 4340343373. The next prime is 4340343433. The reversal of 4340343421 is 1243430434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4078227321 + 262116100 = 63861^2 + 16190^2 .

It is a cyclic number.

It is not a de Polignac number, because 4340343421 - 2¹¹ = 4340341373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4340343421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4340343521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2170171710 + 2170171711.

It is an arithmetic number, because the mean of its divisors is an integer number (2170171711).

Almost surely, 2^4340343421 is an apocalyptic number.

It is an amenable number.

4340343421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4340343421 is an equidigital number, since it uses as much as digits as its factorization.

4340343421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 28.

The square root of 4340343421 is about 65881.2827819860. The cubic root of 4340343421 is about 1631.2030739504.

Adding to 4340343421 its reverse (1243430434), we get a palindrome (5583773855).

The spelling of 4340343421 in words is "four billion, three hundred forty million, three hundred forty-three thousand, four hundred twenty-one".