1680587871 has 8 divisors (see below), whose sum is σ = 2255624064. Its totient is φ = 1112971800.

The previous prime is 1680587849. The next prime is 1680587893. The reversal of 1680587871 is 1787850861.

It is an interprime number because it is at equal distance from previous prime (1680587849) and next prime (1680587893).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1680587871 - 2⁶ = 1680587807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680587771) 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, 1854501 + ... + 1855406.

It is an arithmetic number, because the mean of its divisors is an integer number (281953008).

Almost surely, 2^1680587871 is an apocalyptic number.

1680587871 is a deficient number, since it is larger than the sum of its proper divisors (575036193).

1680587871 is a wasteful number, since it uses less digits than its factorization.

1680587871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3710061.

The product of its (nonzero) digits is 752640, while the sum is 51.

The square root of 1680587871 is about 40994.9737284951. The cubic root of 1680587871 is about 1188.9230354672.

The spelling of 1680587871 in words is "one billion, six hundred eighty million, five hundred eighty-seven thousand, eight hundred seventy-one".