4000143643 has 2 divisors, whose sum is σ = 4000143644. Its totient is φ = 4000143642.

The previous prime is 4000143629. The next prime is 4000143649. The reversal of 4000143643 is 3463410004.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4000143643 - 2⁵ = 4000143611 is a prime.

It is a super-2 number, since 2×4000143643² = 32002298329266622898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4000143649) 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, 2000071821 + 2000071822.

It is an arithmetic number, because the mean of its divisors is an integer number (2000071822).

Almost surely, 2^4000143643 is an apocalyptic number.

4000143643 is a deficient number, since it is larger than the sum of its proper divisors (1).

4000143643 is an equidigital number, since it uses as much as digits as its factorization.

4000143643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 4000143643 is about 63246.6887907976. The cubic root of 4000143643 is about 1587.4200533282.

Adding to 4000143643 its reverse (3463410004), we get a palindrome (7463553647).

The spelling of 4000143643 in words is "four billion, one hundred forty-three thousand, six hundred forty-three".