9945906043 has 2 divisors, whose sum is σ = 9945906044. Its totient is φ = 9945906042.

The previous prime is 9945906029. The next prime is 9945906071. The reversal of 9945906043 is 3406095499.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9945906043 - 2⁵ = 9945906011 is a prime.

It is not a weakly prime, because it can be changed into another prime (9945906013) 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, 4972953021 + 4972953022.

It is an arithmetic number, because the mean of its divisors is an integer number (4972953022).

Almost surely, 2^9945906043 is an apocalyptic number.

9945906043 is a deficient number, since it is larger than the sum of its proper divisors (1).

9945906043 is an equidigital number, since it uses as much as digits as its factorization.

9945906043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1049760, while the sum is 49.

The square root of 9945906043 is about 99729.1634528236. The cubic root of 9945906043 is about 2150.5429343086.

The spelling of 9945906043 in words is "nine billion, nine hundred forty-five million, nine hundred six thousand, forty-three".