999999043 has 2 divisors, whose sum is σ = 999999044. Its totient is φ = 999999042.

The previous prime is 999999029. The next prime is 999999059. The reversal of 999999043 is 340999999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999999043 - 2¹³ = 999990851 is a prime.

It is not a weakly prime, because it can be changed into another prime (999996043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999521 + 499999522.

It is an arithmetic number, because the mean of its divisors is an integer number (499999522).

Almost surely, 2^999999043 is an apocalyptic number.

999999043 is a deficient number, since it is larger than the sum of its proper divisors (1).

999999043 is an equidigital number, since it uses as much as digits as its factorization.

999999043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6377292, while the sum is 61.

The square root of 999999043 is about 31622.7614701816. The cubic root of 999999043 is about 999.9996809999. Note that the first 3 decimals are identical.

The spelling of 999999043 in words is "nine hundred ninety-nine million, nine hundred ninety-nine thousand, forty-three".