99000043 has 4 divisors (see below), whose sum is σ = 100020760. Its totient is φ = 97979328.

The previous prime is 99000037. The next prime is 99000047. The reversal of 99000043 is 34000099.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99000043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 98999981 and 99000017.

It is not an unprimeable number, because it can be changed into a prime (99000047) 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, 510213 + ... + 510406.

It is an arithmetic number, because the mean of its divisors is an integer number (25005190).

Almost surely, 2^99000043 is an apocalyptic number.

99000043 is a deficient number, since it is larger than the sum of its proper divisors (1020717).

99000043 is a wasteful number, since it uses less digits than its factorization.

99000043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020716.

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

The square root of 99000043 is about 9949.8765318973. The cubic root of 99000043 is about 462.6065678950.

The spelling of 99000043 in words is "ninety-nine million, forty-three", and thus it is an aban number and an uban number.