2340543421 has 2 divisors, whose sum is σ = 2340543422. Its totient is φ = 2340543420.

The previous prime is 2340543419. The next prime is 2340543427. The reversal of 2340543421 is 1243450432.

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., 1639035225 + 701508196 = 40485^2 + 26486^2 .

It is a cyclic number.

It is not a de Polignac number, because 2340543421 - 2¹ = 2340543419 is a prime.

Together with 2340543419, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2340543421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2340543427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1170271710 + 1170271711.

It is an arithmetic number, because the mean of its divisors is an integer number (1170271711).

Almost surely, 2^2340543421 is an apocalyptic number.

It is an amenable number.

2340543421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2340543421 is an equidigital number, since it uses as much as digits as its factorization.

2340543421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 2340543421 is about 48379.1630870151. The cubic root of 2340543421 is about 1327.7171574670.

Adding to 2340543421 its reverse (1243450432), we get a palindrome (3583993853).

The spelling of 2340543421 in words is "two billion, three hundred forty million, five hundred forty-three thousand, four hundred twenty-one".