1680023 has 2 divisors, whose sum is σ = 1680024. Its totient is φ = 1680022.

The previous prime is 1680013. The next prime is 1680071. The reversal of 1680023 is 3200861.

It is a weak prime.

It is an emirp because it is prime and its reverse (3200861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1680023 - 2⁶ = 1679959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1679977 and 1680004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1680013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840011 + 840012.

It is an arithmetic number, because the mean of its divisors is an integer number (840012).

2^1680023 is an apocalyptic number.

1680023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680023 is an equidigital number, since it uses as much as digits as its factorization.

1680023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1680023 is about 1296.1570120938. The cubic root of 1680023 is about 118.8789815536.

Adding to 1680023 its reverse (3200861), we get a palindrome (4880884).

The spelling of 1680023 in words is "one million, six hundred eighty thousand, twenty-three".