9940043 has 2 divisors, whose sum is σ = 9940044. Its totient is φ = 9940042.

The previous prime is 9940039. The next prime is 9940067. The reversal of 9940043 is 3400499.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9940043 - 2² = 9940039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9939988 and 9940015.

It is not a weakly prime, because it can be changed into another prime (9940003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4970021 + 4970022.

It is an arithmetic number, because the mean of its divisors is an integer number (4970022).

Almost surely, 2^9940043 is an apocalyptic number.

9940043 is a deficient number, since it is larger than the sum of its proper divisors (1).

9940043 is an equidigital number, since it uses as much as digits as its factorization.

9940043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 9940043 is about 3152.7833734654. The cubic root of 9940043 is about 215.0120274505.

The spelling of 9940043 in words is "nine million, nine hundred forty thousand, forty-three".