2116639 has 8 divisors (see below), whose sum is σ = 2459168. Its totient is φ = 1784160.

The previous prime is 2116633. The next prime is 2116651. The reversal of 2116639 is 9366112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2116639 - 2⁵ = 2116607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2052 + ... + 2905.

It is an arithmetic number, because the mean of its divisors is an integer number (307396).

2^2116639 is an apocalyptic number.

2116639 is a deficient number, since it is larger than the sum of its proper divisors (342529).

2116639 is an equidigital number, since it uses as much as digits as its factorization.

2116639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5025.

The product of its digits is 1944, while the sum is 28.

The square root of 2116639 is about 1454.8673479050. The cubic root of 2116639 is about 128.3952423324.

The spelling of 2116639 in words is "two million, one hundred sixteen thousand, six hundred thirty-nine".