1685045047 has 16 divisors (see below), whose sum is σ = 1943056192. Its totient is φ = 1431406080.

The previous prime is 1685045003. The next prime is 1685045053. The reversal of 1685045047 is 7405405861.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1685045047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685045447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 474097 + ... + 477637.

It is an arithmetic number, because the mean of its divisors is an integer number (121441012).

Almost surely, 2^1685045047 is an apocalyptic number.

1685045047 is a deficient number, since it is larger than the sum of its proper divisors (258011145).

1685045047 is a wasteful number, since it uses less digits than its factorization.

1685045047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4138.

The product of its (nonzero) digits is 134400, while the sum is 40.

The square root of 1685045047 is about 41049.3002010997. The cubic root of 1685045047 is about 1189.9731761955.

The spelling of 1685045047 in words is "one billion, six hundred eighty-five million, forty-five thousand, forty-seven".