2116678 has 4 divisors (see below), whose sum is σ = 3175020. Its totient is φ = 1058338.

The previous prime is 2116669. The next prime is 2116679. The reversal of 2116678 is 8766112.

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

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 an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116679) 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 as a sum of consecutive naturals, namely, 529168 + ... + 529171.

It is an arithmetic number, because the mean of its divisors is an integer number (793755).

2^2116678 is an apocalyptic number.

2116678 is a deficient number, since it is larger than the sum of its proper divisors (1058342).

2116678 is a wasteful number, since it uses less digits than its factorization.

2116678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058341.

The product of its digits is 4032, while the sum is 31.

The square root of 2116678 is about 1454.8807511270. The cubic root of 2116678 is about 128.3960309070.

It can be divided in two parts, 211 and 6678, that added together give a square (6889 = 83²).

The spelling of 2116678 in words is "two million, one hundred sixteen thousand, six hundred seventy-eight".