1680707 has 4 divisors (see below), whose sum is σ = 1920816. Its totient is φ = 1440600.

The previous prime is 1680703. The next prime is 1680709. The reversal of 1680707 is 7070861.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1680707 - 2² = 1680703 is a prime.

It is a Duffinian number.

1680707 is a modest number, since divided by 707 gives 168 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 1680707.

It is not an unprimeable number, because it can be changed into a prime (1680703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120044 + ... + 120057.

It is an arithmetic number, because the mean of its divisors is an integer number (480204).

2^1680707 is an apocalyptic number.

1680707 is a deficient number, since it is larger than the sum of its proper divisors (240109).

1680707 is an equidigital number, since it uses as much as digits as its factorization.

1680707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240108.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 1680707 is about 1296.4208421651. The cubic root of 1680707 is about 118.8951127198.

The spelling of 1680707 in words is "one million, six hundred eighty thousand, seven hundred seven".