1688862613 has 2 divisors, whose sum is σ = 1688862614. Its totient is φ = 1688862612.

The previous prime is 1688862601. The next prime is 1688862661. The reversal of 1688862613 is 3162688861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1655025124 + 33837489 = 40682^2 + 5817^2 .

It is a cyclic number.

It is not a de Polignac number, because 1688862613 - 2¹³ = 1688854421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1688868613) 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, 844431306 + 844431307.

It is an arithmetic number, because the mean of its divisors is an integer number (844431307).

Almost surely, 2^1688862613 is an apocalyptic number.

It is an amenable number.

1688862613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1688862613 is an equidigital number, since it uses as much as digits as its factorization.

1688862613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 663552, while the sum is 49.

The square root of 1688862613 is about 41095.7736634803. The cubic root of 1688862613 is about 1190.8711491803.

The spelling of 1688862613 in words is "one billion, six hundred eighty-eight million, eight hundred sixty-two thousand, six hundred thirteen".