2043681687 has 12 divisors (see below), whose sum is σ = 2964236704. Its totient is φ = 1356799680.

The previous prime is 2043681677. The next prime is 2043681691. The reversal of 2043681687 is 7861863402.

2043681687 is a `hidden beast` number, since 204 + 368 + 1 + 6 + 87 = 666.

It is not a de Polignac number, because 2043681687 - 2⁶ = 2043681623 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 (2043681677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 468943 + ... + 473280.

Almost surely, 2^2043681687 is an apocalyptic number.

2043681687 is a deficient number, since it is larger than the sum of its proper divisors (920555017).

2043681687 is a wasteful number, since it uses less digits than its factorization.

2043681687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942470 (or 942467 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 2043681687 is about 45207.0977502427. The cubic root of 2043681687 is about 1269.0276490985.

The spelling of 2043681687 in words is "two billion, forty-three million, six hundred eighty-one thousand, six hundred eighty-seven".