1680679 has 32 divisors (see below), whose sum is σ = 2386944. Its totient is φ = 1140480.

The previous prime is 1680659. The next prime is 1680689. The reversal of 1680679 is 9760861.

It is not a de Polignac number, because 1680679 - 2⁵ = 1680647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680659) 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 31 ways as a sum of consecutive naturals, for example, 22987 + ... + 23059.

It is an arithmetic number, because the mean of its divisors is an integer number (74592).

2^1680679 is an apocalyptic number.

1680679 is a deficient number, since it is larger than the sum of its proper divisors (706265).

1680679 is a wasteful number, since it uses less digits than its factorization.

1680679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127.

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

The square root of 1680679 is about 1296.4100431576. The cubic root of 1680679 is about 118.8944524656.

The spelling of 1680679 in words is "one million, six hundred eighty thousand, six hundred seventy-nine".