994117993 has 16 divisors (see below), whose sum is σ = 1159456896. Its totient is φ = 842307840.

The previous prime is 994117991. The next prime is 994118003. The reversal of 994117993 is 399711499.

It is not a de Polignac number, because 994117993 - 2¹ = 994117991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 994117993.

It is not an unprimeable number, because it can be changed into a prime (994117991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6546 + ... + 45067.

It is an arithmetic number, because the mean of its divisors is an integer number (72466056).

Almost surely, 2^994117993 is an apocalyptic number.

It is an amenable number.

994117993 is a deficient number, since it is larger than the sum of its proper divisors (165338903).

994117993 is a wasteful number, since it uses less digits than its factorization.

994117993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51744.

The product of its digits is 551124, while the sum is 52.

The square root of 994117993 is about 31529.6367406921. The cubic root of 994117993 is about 998.0354741655.

The spelling of 994117993 in words is "nine hundred ninety-four million, one hundred seventeen thousand, nine hundred ninety-three".