99043993 has 4 divisors (see below), whose sum is σ = 101151360. Its totient is φ = 96936628.

The previous prime is 99043943. The next prime is 99043999. The reversal of 99043993 is 39934099.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39934099 = 3083 ⋅12953.

It is a cyclic number.

It is not a de Polignac number, because 99043993 - 2¹³ = 99035801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99043999) 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, 1053613 + ... + 1053706.

It is an arithmetic number, because the mean of its divisors is an integer number (25287840).

Almost surely, 2^99043993 is an apocalyptic number.

It is an amenable number.

99043993 is a deficient number, since it is larger than the sum of its proper divisors (2107367).

99043993 is a wasteful number, since it uses less digits than its factorization.

99043993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107366.

The product of its (nonzero) digits is 236196, while the sum is 46.

The square root of 99043993 is about 9952.0848569533. The cubic root of 99043993 is about 462.6750141640.

The spelling of 99043993 in words is "ninety-nine million, forty-three thousand, nine hundred ninety-three".