687539489 has 12 divisors (see below), whose sum is σ = 850853376. Its totient is φ = 543986352.

The previous prime is 687539473. The next prime is 687539539. The reversal of 687539489 is 984935786.

It is not a de Polignac number, because 687539489 - 2⁴ = 687539473 is a prime.

It is a super-2 number, since 2×687539489² = 945421097868762242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687539689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 289409 + ... + 291774.

It is an arithmetic number, because the mean of its divisors is an integer number (70904448).

Almost surely, 2^687539489 is an apocalyptic number.

It is an amenable number.

687539489 is a deficient number, since it is larger than the sum of its proper divisors (163313887).

687539489 is a wasteful number, since it uses less digits than its factorization.

687539489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581216 (or 581203 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 59.

The square root of 687539489 is about 26220.9742191247. The cubic root of 687539489 is about 882.6039816808.

It can be divided in two parts, 6875 and 39489, that added together give a palindrome (46364).

The spelling of 687539489 in words is "six hundred eighty-seven million, five hundred thirty-nine thousand, four hundred eighty-nine".