1687055530 has 16 divisors (see below), whose sum is σ = 3045407400. Its totient is φ = 672887232.

The previous prime is 1687055527. The next prime is 1687055533. The reversal of 1687055530 is 355507861.

It is an interprime number because it is at equal distance from previous prime (1687055527) and next prime (1687055533).

It can be written as a sum of positive squares in 4 ways, for example, as 1484021529 + 203034001 = 38523^2 + 14249^2 .

It is a super-2 number, since 2×1687055530² = 5692312722607161800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1687055533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238209 + ... + 245188.

Almost surely, 2^1687055530 is an apocalyptic number.

1687055530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1687055530 is a deficient number, since it is larger than the sum of its proper divisors (1358351870).

1687055530 is a wasteful number, since it uses less digits than its factorization.

1687055530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483753.

The product of its (nonzero) digits is 126000, while the sum is 40.

The square root of 1687055530 is about 41073.7815400530. The cubic root of 1687055530 is about 1190.4462535540.

The spelling of 1687055530 in words is "one billion, six hundred eighty-seven million, fifty-five thousand, five hundred thirty".