1688385607 has 2 divisors, whose sum is σ = 1688385608. Its totient is φ = 1688385606.

The previous prime is 1688385599. The next prime is 1688385631. The reversal of 1688385607 is 7065838861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1688385607 - 2³ = 1688385599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1688385637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 844192803 + 844192804.

It is an arithmetic number, because the mean of its divisors is an integer number (844192804).

Almost surely, 2^1688385607 is an apocalyptic number.

1688385607 is a deficient number, since it is larger than the sum of its proper divisors (1).

1688385607 is an equidigital number, since it uses as much as digits as its factorization.

1688385607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The square root of 1688385607 is about 41089.9696641407. The cubic root of 1688385607 is about 1190.7590212176.

The spelling of 1688385607 in words is "one billion, six hundred eighty-eight million, three hundred eighty-five thousand, six hundred seven".