99427993 has 8 divisors (see below), whose sum is σ = 116403840. Its totient is φ = 83145120.

The previous prime is 99427973. The next prime is 99428023. The reversal of 99427993 is 39972499.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99427993 - 2⁵ = 99427961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99427993.

It is not an unprimeable number, because it can be changed into a prime (99427963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172933 + ... + 173506.

It is an arithmetic number, because the mean of its divisors is an integer number (14550480).

Almost surely, 2^99427993 is an apocalyptic number.

It is an amenable number.

99427993 is a deficient number, since it is larger than the sum of its proper divisors (16975847).

99427993 is a wasteful number, since it uses less digits than its factorization.

99427993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346487.

The product of its digits is 1102248, while the sum is 52.

The square root of 99427993 is about 9971.3586336066. The cubic root of 99427993 is about 463.2721834429.

The spelling of 99427993 in words is "ninety-nine million, four hundred twenty-seven thousand, nine hundred ninety-three".