1688101 has 2 divisors, whose sum is σ = 1688102. Its totient is φ = 1688100.

The previous prime is 1688081. The next prime is 1688123. The reversal of 1688101 is 1018861.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1623076 + 65025 = 1274^2 + 255^2 .

It is a cyclic number.

It is not a de Polignac number, because 1688101 - 2⁵ = 1688069 is a prime.

1688101 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1688161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 844050 + 844051.

It is an arithmetic number, because the mean of its divisors is an integer number (844051).

2^1688101 is an apocalyptic number.

It is an amenable number.

1688101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1688101 is an equidigital number, since it uses as much as digits as its factorization.

1688101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 25.

The square root of 1688101 is about 1299.2694100917. The cubic root of 1688101 is about 119.0692109687.

The spelling of 1688101 in words is "one million, six hundred eighty-eight thousand, one hundred one".