1681707 has 8 divisors (see below), whose sum is σ = 2290176. Its totient is φ = 1097192.

The previous prime is 1681703. The next prime is 1681711. The reversal of 1681707 is 7071861.

It is an interprime number because it is at equal distance from previous prime (1681703) and next prime (1681711).

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 1681707 - 2² = 1681703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1681703) 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, 5823 + ... + 6104.

It is an arithmetic number, because the mean of its divisors is an integer number (286272).

2^1681707 is an apocalyptic number.

1681707 is a deficient number, since it is larger than the sum of its proper divisors (608469).

1681707 is a wasteful number, since it uses less digits than its factorization.

1681707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11977.

The product of its (nonzero) digits is 2352, while the sum is 30.

The square root of 1681707 is about 1296.8064620444. The cubic root of 1681707 is about 118.9186884214.

The spelling of 1681707 in words is "one million, six hundred eighty-one thousand, seven hundred seven".