1686530485 has 8 divisors (see below), whose sum is σ = 2078535096. Its totient is φ = 1312758720.

The previous prime is 1686530471. The next prime is 1686530533. The reversal of 1686530485 is 5840356861.

It can be written as a sum of positive squares in 4 ways, for example, as 789947236 + 896583249 = 28106^2 + 29943^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1686530485 - 2⁹ = 1686529973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4558006 + ... + 4558375.

It is an arithmetic number, because the mean of its divisors is an integer number (259816887).

Almost surely, 2^1686530485 is an apocalyptic number.

It is an amenable number.

1686530485 is a deficient number, since it is larger than the sum of its proper divisors (392004611).

1686530485 is an equidigital number, since it uses as much as digits as its factorization.

1686530485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9116423.

The product of its (nonzero) digits is 691200, while the sum is 46.

The square root of 1686530485 is about 41067.3895566787. The cubic root of 1686530485 is about 1190.3227439451.

The spelling of 1686530485 in words is "one billion, six hundred eighty-six million, five hundred thirty thousand, four hundred eighty-five".