99923443 has 4 divisors (see below), whose sum is σ = 102247288. Its totient is φ = 97599600.

The previous prime is 99923419. The next prime is 99923449. The reversal of 99923443 is 34432999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34432999 = 47 ⋅732617.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99923443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 2323801 = 99923443 / (9 + 9 + 9 + 2 + 3 + 4 + 4 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99923443.

It is not an unprimeable number, because it can be changed into a prime (99923449) 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, 1161858 + ... + 1161943.

It is an arithmetic number, because the mean of its divisors is an integer number (25561822).

Almost surely, 2^99923443 is an apocalyptic number.

99923443 is a deficient number, since it is larger than the sum of its proper divisors (2323845).

99923443 is a wasteful number, since it uses less digits than its factorization.

99923443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323844.

The product of its digits is 209952, while the sum is 43.

The square root of 99923443 is about 9996.1714170976. The cubic root of 99923443 is about 464.0404044160.

It can be divided in two parts, 999 and 23443, that added together give a palindrome (24442).

The spelling of 99923443 in words is "ninety-nine million, nine hundred twenty-three thousand, four hundred forty-three".