993311999 has 4 divisors (see below), whose sum is σ = 993405864. Its totient is φ = 993218136.

The previous prime is 993311947. The next prime is 993312011. The reversal of 993311999 is 999113399.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 999113399 = 23 ⋅43439713.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-993311999 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 993311999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (993311929) 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, 28697 + ... + 53010.

It is an arithmetic number, because the mean of its divisors is an integer number (248351466).

Almost surely, 2^993311999 is an apocalyptic number.

993311999 is a deficient number, since it is larger than the sum of its proper divisors (93865).

993311999 is a wasteful number, since it uses less digits than its factorization.

993311999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93864.

The product of its digits is 531441, while the sum is 53.

The square root of 993311999 is about 31516.8526188768. The cubic root of 993311999 is about 997.7656778559.

The spelling of 993311999 in words is "nine hundred ninety-three million, three hundred eleven thousand, nine hundred ninety-nine".