2116819 has 4 divisors (see below), whose sum is σ = 2123896. Its totient is φ = 2109744.

The previous prime is 2116817. The next prime is 2116837. The reversal of 2116819 is 9186112.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2116819 - 2¹ = 2116817 is a prime.

It is a super-2 number, since 2×2116819² = 8961845357522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2116811) 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, 3069 + ... + 3694.

It is an arithmetic number, because the mean of its divisors is an integer number (530974).

2^2116819 is an apocalyptic number.

2116819 is a deficient number, since it is larger than the sum of its proper divisors (7077).

2116819 is an equidigital number, since it uses as much as digits as its factorization.

2116819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7076.

The product of its digits is 864, while the sum is 28.

The square root of 2116819 is about 1454.9292078998. The cubic root of 2116819 is about 128.3988818269.

The spelling of 2116819 in words is "two million, one hundred sixteen thousand, eight hundred nineteen".