1680319 has 2 divisors, whose sum is σ = 1680320. Its totient is φ = 1680318.

The previous prime is 1680317. The next prime is 1680323. The reversal of 1680319 is 9130861.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1680319 - 2¹ = 1680317 is a prime.

It is a super-2 number, since 2×1680319² = 5646943883522, which contains 22 as substring.

Together with 1680317, it forms a pair of twin primes.

It is a Chen prime.

1680319 is a lucky number.

It is equal to p₁₂₆₇₇₅ and since 1680319 and 126775 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1680313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840159 + 840160.

It is an arithmetic number, because the mean of its divisors is an integer number (840160).

2^1680319 is an apocalyptic number.

1680319 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680319 is an equidigital number, since it uses as much as digits as its factorization.

1680319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1680319 is about 1296.2711907622. The cubic root of 1680319 is about 118.8859628295.

The spelling of 1680319 in words is "one million, six hundred eighty thousand, three hundred nineteen".