99999043 has 2 divisors, whose sum is σ = 99999044. Its totient is φ = 99999042.

The previous prime is 99998999. The next prime is 99999073. The reversal of 99999043 is 34099999.

It is a strong prime.

It is an emirp because it is prime and its reverse (34099999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99999043 - 2²⁵ = 66444611 is a prime.

It is not a weakly prime, because it can be changed into another prime (99999073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49999521 + 49999522.

It is an arithmetic number, because the mean of its divisors is an integer number (49999522).

Almost surely, 2^99999043 is an apocalyptic number.

99999043 is a deficient number, since it is larger than the sum of its proper divisors (1).

99999043 is an equidigital number, since it uses as much as digits as its factorization.

99999043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 708588, while the sum is 52.

The square root of 99999043 is about 9999.9521498855. The cubic root of 99999043 is about 464.1574026897.

The spelling of 99999043 in words is "ninety-nine million, nine hundred ninety-nine thousand, forty-three".