43000099 has 4 divisors (see below), whose sum is σ = 43136064. Its totient is φ = 42864136.

The previous prime is 43000093. The next prime is 43000109. The reversal of 43000099 is 99000034.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43000099 - 2¹⁷ = 42869027 is a prime.

It is a Duffinian number.

43000099 is a modest number, since divided by 99 gives 43 as remainder.

It is not an unprimeable number, because it can be changed into a prime (43000093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67507 + ... + 68140.

It is an arithmetic number, because the mean of its divisors is an integer number (10784016).

Almost surely, 2^43000099 is an apocalyptic number.

43000099 is a deficient number, since it is larger than the sum of its proper divisors (135965).

43000099 is a wasteful number, since it uses less digits than its factorization.

43000099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135964.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 43000099 is about 6557.4460729769. The cubic root of 43000099 is about 350.3400749039.

The spelling of 43000099 in words is "forty-three million, ninety-nine", and thus it is an aban number and an uban number.