1688061 has 8 divisors (see below), whose sum is σ = 2328480. Its totient is φ = 1086512.

The previous prime is 1688047. The next prime is 1688069. The reversal of 1688061 is 1608861.

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 1688061 - 2⁹ = 1687549 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1688069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9615 + ... + 9788.

It is an arithmetic number, because the mean of its divisors is an integer number (291060).

2^1688061 is an apocalyptic number.

It is an amenable number.

1688061 is a deficient number, since it is larger than the sum of its proper divisors (640419).

1688061 is a wasteful number, since it uses less digits than its factorization.

1688061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19435.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 1688061 is about 1299.2540167342. The cubic root of 1688061 is about 119.0682705024.

The spelling of 1688061 in words is "one million, six hundred eighty-eight thousand, sixty-one".