1688241407 has 2 divisors, whose sum is σ = 1688241408. Its totient is φ = 1688241406.

The previous prime is 1688241397. The next prime is 1688241421. The reversal of 1688241407 is 7041428861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1688241407 - 2¹² = 1688237311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1688241427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 844120703 + 844120704.

It is an arithmetic number, because the mean of its divisors is an integer number (844120704).

Almost surely, 2^1688241407 is an apocalyptic number.

1688241407 is a deficient number, since it is larger than the sum of its proper divisors (1).

1688241407 is an equidigital number, since it uses as much as digits as its factorization.

1688241407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86016, while the sum is 41.

The square root of 1688241407 is about 41088.2149405398. The cubic root of 1688241407 is about 1190.7251205220.

The spelling of 1688241407 in words is "one billion, six hundred eighty-eight million, two hundred forty-one thousand, four hundred seven".