1688241427 has 2 divisors, whose sum is σ = 1688241428. Its totient is φ = 1688241426.

The previous prime is 1688241421. The next prime is 1688241473. The reversal of 1688241427 is 7241428861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1688241427 - 2⁷ = 1688241299 is a prime.

It is not a weakly prime, because it can be changed into another prime (1688241421) 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, 844120713 + 844120714.

It is an arithmetic number, because the mean of its divisors is an integer number (844120714).

Almost surely, 2^1688241427 is an apocalyptic number.

1688241427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1688241427 is an equidigital number, since it uses as much as digits as its factorization.

1688241427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172032, while the sum is 43.

The square root of 1688241427 is about 41088.2151839186. The cubic root of 1688241427 is about 1190.7251252240.

The spelling of 1688241427 in words is "one billion, six hundred eighty-eight million, two hundred forty-one thousand, four hundred twenty-seven".