2116637 has 4 divisors (see below), whose sum is σ = 2138556. Its totient is φ = 2094720.

The previous prime is 2116633. The next prime is 2116651. The reversal of 2116637 is 7366112.

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 1104601 + 1012036 = 1051^2 + 1006^2 .

It is a cyclic number.

It is not a de Polignac number, because 2116637 - 2² = 2116633 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 3 ways as a sum of consecutive naturals, for example, 10814 + ... + 11007.

It is an arithmetic number, because the mean of its divisors is an integer number (534639).

2^2116637 is an apocalyptic number.

It is an amenable number.

2116637 is a deficient number, since it is larger than the sum of its proper divisors (21919).

2116637 is an equidigital number, since it uses as much as digits as its factorization.

2116637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21918.

The product of its digits is 1512, while the sum is 26.

The square root of 2116637 is about 1454.8666605569. The cubic root of 2116637 is about 128.3952018924.

The spelling of 2116637 in words is "two million, one hundred sixteen thousand, six hundred thirty-seven".