1680947 has 8 divisors (see below), whose sum is σ = 1742832. Its totient is φ = 1620000.

The previous prime is 1680929. The next prime is 1680961. The reversal of 1680947 is 7490861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1680947 - 2¹⁴ = 1664563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1680907) 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 in 7 ways as a sum of consecutive naturals, for example, 6572 + ... + 6822.

It is an arithmetic number, because the mean of its divisors is an integer number (217854).

2^1680947 is an apocalyptic number.

1680947 is a deficient number, since it is larger than the sum of its proper divisors (61885).

1680947 is a wasteful number, since it uses less digits than its factorization.

1680947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 1680947 is about 1296.5134013962. The cubic root of 1680947 is about 118.9007717409.

The spelling of 1680947 in words is "one million, six hundred eighty thousand, nine hundred forty-seven".