1680967 has 2 divisors, whose sum is σ = 1680968. Its totient is φ = 1680966.

The previous prime is 1680961. The next prime is 1680979. The reversal of 1680967 is 7690861.

It is a weak prime.

It is an emirp because it is prime and its reverse (7690861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1680967 - 2⁷ = 1680839 is a prime.

1680967 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1680961) 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, 840483 + 840484.

It is an arithmetic number, because the mean of its divisors is an integer number (840484).

2^1680967 is an apocalyptic number.

1680967 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680967 is an equidigital number, since it uses as much as digits as its factorization.

1680967 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 1680967 is about 1296.5211143672. The cubic root of 1680967 is about 118.9012433016.

The spelling of 1680967 in words is "one million, six hundred eighty thousand, nine hundred sixty-seven".