1689202045387 has 2 divisors, whose sum is σ = 1689202045388. Its totient is φ = 1689202045386.

The previous prime is 1689202045381. The next prime is 1689202045483. The reversal of 1689202045387 is 7835402029861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1689202045387 - 2¹¹ = 1689202043339 is a prime.

It is not a weakly prime, because it can be changed into another prime (1689202045381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 844601022693 + 844601022694.

It is an arithmetic number, because the mean of its divisors is an integer number (844601022694).

It is a 1-persistent number, because it is pandigital, but 2⋅1689202045387 = 3378404090774 is not.

Almost surely, 2^{1689202045387} is an apocalyptic number.

1689202045387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1689202045387 is an equidigital number, since it uses as much as digits as its factorization.

1689202045387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 1689202045387 in words is "one trillion, six hundred eighty-nine billion, two hundred two million, forty-five thousand, three hundred eighty-seven".