1685406413 has 16 divisors (see below), whose sum is σ = 1739537856. Its totient is φ = 1632234240.

The previous prime is 1685406409. The next prime is 1685406431. The reversal of 1685406413 is 3146045861.

It is a cyclic number.

It is not a de Polignac number, because 1685406413 - 2² = 1685406409 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685406433) 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, 2077778 + ... + 2078588.

It is an arithmetic number, because the mean of its divisors is an integer number (108721116).

Almost surely, 2^1685406413 is an apocalyptic number.

It is an amenable number.

1685406413 is a deficient number, since it is larger than the sum of its proper divisors (54131443).

1685406413 is a wasteful number, since it uses less digits than its factorization.

1685406413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 1685406413 is about 41053.7015748885. The cubic root of 1685406413 is about 1190.0582352689.

The spelling of 1685406413 in words is "one billion, six hundred eighty-five million, four hundred six thousand, four hundred thirteen".