1687171132 has 6 divisors (see below), whose sum is σ = 2952549488. Its totient is φ = 843585564.

The previous prime is 1687171127. The next prime is 1687171133. The reversal of 1687171132 is 2311717861.

It is a super-2 number, since 2×1687171132² = 5693092857308322848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1687171091 and 1687171100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1687171133) by changing a digit.

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 as a sum of consecutive naturals, namely, 210896388 + ... + 210896395.

Almost surely, 2^1687171132 is an apocalyptic number.

It is an amenable number.

1687171132 is a deficient number, since it is larger than the sum of its proper divisors (1265378356).

1687171132 is a wasteful number, since it uses less digits than its factorization.

1687171132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421792787 (or 421792785 counting only the distinct ones).

The product of its digits is 14112, while the sum is 37.

The square root of 1687171132 is about 41075.1887640215. The cubic root of 1687171132 is about 1190.4734438909.

Adding to 1687171132 its reverse (2311717861), we get a palindrome (3998888993).

The spelling of 1687171132 in words is "one billion, six hundred eighty-seven million, one hundred seventy-one thousand, one hundred thirty-two".