2146789 has 2 divisors, whose sum is σ = 2146790. Its totient is φ = 2146788.

The previous prime is 2146787. The next prime is 2146813. The reversal of 2146789 is 9876412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2125764 + 21025 = 1458^2 + 145^2 .

It is a cyclic number.

It is not a de Polignac number, because 2146789 - 2¹ = 2146787 is a prime.

Together with 2146787, it forms a pair of twin primes.

It is a d-powerful number, because it can be written as 2²¹ + 1 + 4² + 6² + 7⁵ + 8⁵ + 9 .

2146789 is a lucky number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2146787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1073394 + 1073395.

It is an arithmetic number, because the mean of its divisors is an integer number (1073395).

2^2146789 is an apocalyptic number.

It is an amenable number.

2146789 is a deficient number, since it is larger than the sum of its proper divisors (1).

2146789 is an equidigital number, since it uses as much as digits as its factorization.

2146789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 2146789 is about 1465.1924788232. The cubic root of 2146789 is about 129.0020030536.

The spelling of 2146789 in words is "two million, one hundred forty-six thousand, seven hundred eighty-nine".