1686468231 has 48 divisors (see below), whose sum is σ = 2932633600. Its totient is φ = 932556240.

The previous prime is 1686468229. The next prime is 1686468269. The reversal of 1686468231 is 1328646861.

1686468231 is a `hidden beast` number, since 168 + 6 + 468 + 23 + 1 = 666.

It is not a de Polignac number, because 1686468231 - 2¹ = 1686468229 is a prime.

It is a super-2 number, since 2×1686468231² = 5688350188344538722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1686468431) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 86886 + ... + 104508.

Almost surely, 2^1686468231 is an apocalyptic number.

1686468231 is a deficient number, since it is larger than the sum of its proper divisors (1246165369).

1686468231 is a wasteful number, since it uses less digits than its factorization.

1686468231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17681 (or 17664 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 1686468231 is about 41066.6316003638. The cubic root of 1686468231 is about 1190.3080978488.

The spelling of 1686468231 in words is "one billion, six hundred eighty-six million, four hundred sixty-eight thousand, two hundred thirty-one".