99943423 has 4 divisors (see below), whose sum is σ = 100358368. Its totient is φ = 99528480.

The previous prime is 99943409. The next prime is 99943433. The reversal of 99943423 is 32434999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32434999 = 1097 ⋅29567.

It is a cyclic number.

It is not a de Polignac number, because 99943423 - 2⁹ = 99942911 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a self number, because there is not a number n which added to its sum of digits gives 99943423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99943433) 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, 207111 + ... + 207592.

It is an arithmetic number, because the mean of its divisors is an integer number (25089592).

Almost surely, 2^99943423 is an apocalyptic number.

99943423 is a deficient number, since it is larger than the sum of its proper divisors (414945).

99943423 is a wasteful number, since it uses less digits than its factorization.

99943423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414944.

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

The square root of 99943423 is about 9997.1707497672. The cubic root of 99943423 is about 464.0713311239.

The spelling of 99943423 in words is "ninety-nine million, nine hundred forty-three thousand, four hundred twenty-three".