687516481 has 8 divisors (see below), whose sum is σ = 710031104. Its totient is φ = 665022960.

The previous prime is 687516469. The next prime is 687516497. The reversal of 687516481 is 184615786.

687516481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 687516481 - 2¹⁷ = 687385409 is a prime.

It is a super-2 number, since 2×687516481² = 945357823293246722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687516581) 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, 86626 + ... + 94228.

It is an arithmetic number, because the mean of its divisors is an integer number (88753888).

Almost surely, 2^687516481 is an apocalyptic number.

It is an amenable number.

687516481 is a deficient number, since it is larger than the sum of its proper divisors (22514623).

687516481 is a wasteful number, since it uses less digits than its factorization.

687516481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10551.

The product of its digits is 322560, while the sum is 46.

The square root of 687516481 is about 26220.5354827090. The cubic root of 687516481 is about 882.5941363413.

The spelling of 687516481 in words is "six hundred eighty-seven million, five hundred sixteen thousand, four hundred eighty-one".