2127689 has 2 divisors, whose sum is σ = 2127690. Its totient is φ = 2127688.

The previous prime is 2127679. The next prime is 2127691. The reversal of 2127689 is 9867212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1974025 + 153664 = 1405^2 + 392^2 .

It is a cyclic number.

It is not a de Polignac number, because 2127689 - 2¹⁶ = 2062153 is a prime.

Together with 2127691, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2127649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1063844 + 1063845.

It is an arithmetic number, because the mean of its divisors is an integer number (1063845).

2^2127689 is an apocalyptic number.

It is an amenable number.

2127689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2127689 is an equidigital number, since it uses as much as digits as its factorization.

2127689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 2127689 is about 1458.6600015082. The cubic root of 2127689 is about 128.6182855080.

The spelling of 2127689 in words is "two million, one hundred twenty-seven thousand, six hundred eighty-nine".