1688607 has 12 divisors (see below), whose sum is σ = 2529800. Its totient is φ = 1125576.

The previous prime is 1688579. The next prime is 1688623. The reversal of 1688607 is 7068861.

It is not a de Polignac number, because 1688607 - 2⁶ = 1688543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1688657) 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 11 ways as a sum of consecutive naturals, for example, 3232 + ... + 3717.

2^1688607 is an apocalyptic number.

1688607 is a deficient number, since it is larger than the sum of its proper divisors (841193).

1688607 is an frugal number, since it uses more digits than its factorization.

1688607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6964 (or 6952 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1688607 is about 1299.4641203204. The cubic root of 1688607 is about 119.0811065843.

The spelling of 1688607 in words is "one million, six hundred eighty-eight thousand, six hundred seven".