1686133924 has 12 divisors (see below), whose sum is σ = 2953143900. Its totient is φ = 842378528.

The previous prime is 1686133913. The next prime is 1686133949. The reversal of 1686133924 is 4293316861.

It can be written as a sum of positive squares in 2 ways, for example, as 936360000 + 749773924 = 30600^2 + 27382^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166579 + ... + 176410.

It is an arithmetic number, because the mean of its divisors is an integer number (246095325).

Almost surely, 2^1686133924 is an apocalyptic number.

It is an amenable number.

1686133924 is a deficient number, since it is larger than the sum of its proper divisors (1267009976).

1686133924 is a wasteful number, since it uses less digits than its factorization.

1686133924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344222 (or 344220 counting only the distinct ones).

The product of its digits is 186624, while the sum is 43.

The square root of 1686133924 is about 41062.5610988891. The cubic root of 1686133924 is about 1190.2294414357.

The spelling of 1686133924 in words is "one billion, six hundred eighty-six million, one hundred thirty-three thousand, nine hundred twenty-four".