687131468 has 24 divisors (see below), whose sum is σ = 1229082624. Its totient is φ = 336042000.

The previous prime is 687131429. The next prime is 687131479. The reversal of 687131468 is 864131786.

687131468 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26543 + ... + 45593.

It is an arithmetic number, because the mean of its divisors is an integer number (51211776).

Almost surely, 2^687131468 is an apocalyptic number.

It is an amenable number.

687131468 is a deficient number, since it is larger than the sum of its proper divisors (541951156).

687131468 is a wasteful number, since it uses less digits than its factorization.

687131468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19253 (or 19251 counting only the distinct ones).

The product of its digits is 193536, while the sum is 44.

The square root of 687131468 is about 26213.1926327184. The cubic root of 687131468 is about 882.4293530587.

The spelling of 687131468 in words is "six hundred eighty-seven million, one hundred thirty-one thousand, four hundred sixty-eight".