9997906043 has 2 divisors, whose sum is σ = 9997906044. Its totient is φ = 9997906042.

The previous prime is 9997906033. The next prime is 9997906099. The reversal of 9997906043 is 3406097999.

It is an a-pointer prime, because the next prime (9997906099) can be obtained adding 9997906043 to its sum of digits (56).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9997906043 - 2⁴ = 9997906027 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9997906043.

It is not a weakly prime, because it can be changed into another prime (9997906003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4998953021 + 4998953022.

It is an arithmetic number, because the mean of its divisors is an integer number (4998953022).

Almost surely, 2^9997906043 is an apocalyptic number.

9997906043 is a deficient number, since it is larger than the sum of its proper divisors (1).

9997906043 is an equidigital number, since it uses as much as digits as its factorization.

9997906043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3306744, while the sum is 56.

The square root of 9997906043 is about 99989.5296668606. The cubic root of 9997906043 is about 2154.2843030813.

The spelling of 9997906043 in words is "nine billion, nine hundred ninety-seven million, nine hundred six thousand, forty-three".