1681673 has 8 divisors (see below), whose sum is σ = 1946880. Its totient is φ = 1422720.

The previous prime is 1681661. The next prime is 1681679. The reversal of 1681673 is 3761861.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1681673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1681679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 968 + ... + 2073.

It is an arithmetic number, because the mean of its divisors is an integer number (243360).

2^1681673 is an apocalyptic number.

It is an amenable number.

1681673 is a deficient number, since it is larger than the sum of its proper divisors (265207).

1681673 is an equidigital number, since it uses as much as digits as its factorization.

1681673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3127.

The product of its digits is 6048, while the sum is 32.

The square root of 1681673 is about 1296.7933528516. The cubic root of 1681673 is about 118.9178870010.

The spelling of 1681673 in words is "one million, six hundred eighty-one thousand, six hundred seventy-three".