4020400343 has 2 divisors, whose sum is σ = 4020400344. Its totient is φ = 4020400342.

The previous prime is 4020400333. The next prime is 4020400387. The reversal of 4020400343 is 3430040204.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4020400343 - 2¹⁶ = 4020334807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4020400333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010200171 + 2010200172.

It is an arithmetic number, because the mean of its divisors is an integer number (2010200172).

Almost surely, 2^4020400343 is an apocalyptic number.

4020400343 is a deficient number, since it is larger than the sum of its proper divisors (1).

4020400343 is an equidigital number, since it uses as much as digits as its factorization.

4020400343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 4020400343 is about 63406.6269643797. The cubic root of 4020400343 is about 1590.0951043412.

Adding to 4020400343 its reverse (3430040204), we get a palindrome (7450440547).

The spelling of 4020400343 in words is "four billion, twenty million, four hundred thousand, three hundred forty-three".