2193689 has 2 divisors, whose sum is σ = 2193690. Its totient is φ = 2193688.

The previous prime is 2193677. The next prime is 2193701. The reversal of 2193689 is 9863912.

It is a balanced prime because it is at equal distance from previous prime (2193677) and next prime (2193701).

It can be written as a sum of positive squares in only one way, i.e., 1646089 + 547600 = 1283^2 + 740^2 .

It is a cyclic number.

It is not a de Polignac number, because 2193689 - 2⁴ = 2193673 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2193649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1096844 + 1096845.

It is an arithmetic number, because the mean of its divisors is an integer number (1096845).

2^2193689 is an apocalyptic number.

It is an amenable number.

2193689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2193689 is an equidigital number, since it uses as much as digits as its factorization.

2193689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 2193689 is about 1481.1107318496. The cubic root of 2193689 is about 129.9346614461.

It can be divided in two parts, 2193 and 689, that added together give a palindrome (2882).

The spelling of 2193689 in words is "two million, one hundred ninety-three thousand, six hundred eighty-nine".