4000343 has 2 divisors, whose sum is σ = 4000344. Its totient is φ = 4000342.

The previous prime is 4000309. The next prime is 4000357. The reversal of 4000343 is 3430004.

It is an a-pointer prime, because the next prime (4000357) can be obtained adding 4000343 to its sum of digits (14).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4000343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4000303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000171 + 2000172.

It is an arithmetic number, because the mean of its divisors is an integer number (2000172).

Almost surely, 2^4000343 is an apocalyptic number.

4000343 is a deficient number, since it is larger than the sum of its proper divisors (1).

4000343 is an equidigital number, since it uses as much as digits as its factorization.

4000343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 14.

The square root of 4000343 is about 2000.0857481618. The cubic root of 4000343 is about 158.7446423885.

Adding to 4000343 its reverse (3430004), we get a palindrome (7430347).

The spelling of 4000343 in words is "four million, three hundred forty-three", and thus it is an aban number.