2136689 has 4 divisors (see below), whose sum is σ = 2140656. Its totient is φ = 2132724.

The previous prime is 2136661. The next prime is 2136707. The reversal of 2136689 is 9866312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2136689 - 2¹² = 2132593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2136649) 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, 1019 + ... + 2304.

It is an arithmetic number, because the mean of its divisors is an integer number (535164).

2^2136689 is an apocalyptic number.

It is an amenable number.

2136689 is a deficient number, since it is larger than the sum of its proper divisors (3967).

2136689 is an equidigital number, since it uses as much as digits as its factorization.

2136689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3966.

The product of its digits is 15552, while the sum is 35.

The square root of 2136689 is about 1461.7417692602. The cubic root of 2136689 is about 128.7993796827.

The spelling of 2136689 in words is "two million, one hundred thirty-six thousand, six hundred eighty-nine".