2116993 has 4 divisors (see below), whose sum is σ = 2241540. Its totient is φ = 1992448.

The previous prime is 2116991. The next prime is 2116997. The reversal of 2116993 is 3996112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1912689 + 204304 = 1383^2 + 452^2 .

It is a cyclic number.

It is not a de Polignac number, because 2116993 - 2¹ = 2116991 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2116991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62248 + ... + 62281.

It is an arithmetic number, because the mean of its divisors is an integer number (560385).

2^2116993 is an apocalyptic number.

It is an amenable number.

2116993 is a deficient number, since it is larger than the sum of its proper divisors (124547).

2116993 is a wasteful number, since it uses less digits than its factorization.

2116993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124546.

The product of its digits is 2916, while the sum is 31.

The square root of 2116993 is about 1454.9890033949. The cubic root of 2116993 is about 128.4023998089.

The spelling of 2116993 in words is "two million, one hundred sixteen thousand, nine hundred ninety-three".