1687313443 has 2 divisors, whose sum is σ = 1687313444. Its totient is φ = 1687313442.

The previous prime is 1687313429. The next prime is 1687313527. The reversal of 1687313443 is 3443137861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1687313443 - 2⁹ = 1687312931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1687313396 and 1687313405.

It is not a weakly prime, because it can be changed into another prime (1687313413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 843656721 + 843656722.

It is an arithmetic number, because the mean of its divisors is an integer number (843656722).

Almost surely, 2^1687313443 is an apocalyptic number.

1687313443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1687313443 is an equidigital number, since it uses as much as digits as its factorization.

1687313443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 40.

The square root of 1687313443 is about 41076.9210506338. The cubic root of 1687313443 is about 1190.5069146514.

The spelling of 1687313443 in words is "one billion, six hundred eighty-seven million, three hundred thirteen thousand, four hundred forty-three".