1681694 has 8 divisors (see below), whose sum is σ = 2882928. Its totient is φ = 720720.

The previous prime is 1681679. The next prime is 1681703. The reversal of 1681694 is 4961861.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 60047 + ... + 60074.

It is an arithmetic number, because the mean of its divisors is an integer number (360366).

2^1681694 is an apocalyptic number.

1681694 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1681694 is a deficient number, since it is larger than the sum of its proper divisors (1201234).

1681694 is a wasteful number, since it uses less digits than its factorization.

1681694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120130.

The product of its digits is 10368, while the sum is 35.

The square root of 1681694 is about 1296.8014497216. The cubic root of 1681694 is about 118.9183819972.

The spelling of 1681694 in words is "one million, six hundred eighty-one thousand, six hundred ninety-four".