1688041 has 2 divisors, whose sum is σ = 1688042. Its totient is φ = 1688040.

The previous prime is 1687999. The next prime is 1688047. The reversal of 1688041 is 1408861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1218816 + 469225 = 1104^2 + 685^2 .

It is a cyclic number.

It is not a de Polignac number, because 1688041 - 2¹³ = 1679849 is a prime.

It is not a weakly prime, because it can be changed into another prime (1688047) 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 as a sum of consecutive naturals, namely, 844020 + 844021.

It is an arithmetic number, because the mean of its divisors is an integer number (844021).

2^1688041 is an apocalyptic number.

It is an amenable number.

1688041 is a deficient number, since it is larger than the sum of its proper divisors (1).

1688041 is an equidigital number, since it uses as much as digits as its factorization.

1688041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 1688041 is about 1299.2463199871. The cubic root of 1688041 is about 119.0678002637.

The spelling of 1688041 in words is "one million, six hundred eighty-eight thousand, forty-one".