1688117 has 8 divisors (see below), whose sum is σ = 1800000. Its totient is φ = 1577664.

The previous prime is 1688101. The next prime is 1688123. The reversal of 1688117 is 7118861.

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 1688117 - 2⁴ = 1688101 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 (1688147) 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, 3134 + ... + 3632.

It is an arithmetic number, because the mean of its divisors is an integer number (225000).

2^1688117 is an apocalyptic number.

1688117 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1688117 is a deficient number, since it is larger than the sum of its proper divisors (111883).

1688117 is a wasteful number, since it uses less digits than its factorization.

1688117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715.

The product of its digits is 2688, while the sum is 32.

The square root of 1688117 is about 1299.2755673836. The cubic root of 1688117 is about 119.0695871510.

The spelling of 1688117 in words is "one million, six hundred eighty-eight thousand, one hundred seventeen".