99999393 has 32 divisors (see below), whose sum is σ = 148055040. Its totient is φ = 59654400.

The previous prime is 99999373. The next prime is 99999401. The reversal of 99999393 is 39399999.

It is not a de Polignac number, because 99999393 - 2⁶ = 99999329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99999323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 208528 + ... + 209006.

It is an arithmetic number, because the mean of its divisors is an integer number (4626720).

Almost surely, 2^99999393 is an apocalyptic number.

It is an amenable number.

99999393 is a deficient number, since it is larger than the sum of its proper divisors (48055647).

99999393 is a wasteful number, since it uses less digits than its factorization.

99999393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649.

The product of its digits is 4782969, while the sum is 60.

The square root of 99999393 is about 9999.9696499539. The cubic root of 99999393 is about 464.1579442112.

The spelling of 99999393 in words is "ninety-nine million, nine hundred ninety-nine thousand, three hundred ninety-three".