1685386147 has 4 divisors (see below), whose sum is σ = 1704323160. Its totient is φ = 1666449136.

The previous prime is 1685386121. The next prime is 1685386159. The reversal of 1685386147 is 7416835861.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1685386147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1685386147.

It is not an unprimeable number, because it can be changed into a prime (1685386117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9468373 + ... + 9468550.

It is an arithmetic number, because the mean of its divisors is an integer number (426080790).

Almost surely, 2^1685386147 is an apocalyptic number.

1685386147 is a deficient number, since it is larger than the sum of its proper divisors (18937013).

1685386147 is an equidigital number, since it uses as much as digits as its factorization.

1685386147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18937012.

The product of its digits is 967680, while the sum is 49.

The square root of 1685386147 is about 41053.4547510925. The cubic root of 1685386147 is about 1190.0534653379.

The spelling of 1685386147 in words is "one billion, six hundred eighty-five million, three hundred eighty-six thousand, one hundred forty-seven".