687648479 has 16 divisors (see below), whose sum is σ = 814387200. Its totient is φ = 568183680.

The previous prime is 687648431. The next prime is 687648517. The reversal of 687648479 is 974846786.

It is a cyclic number.

It is not a de Polignac number, because 687648479 - 2⁸ = 687648223 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 (687648179) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51047 + ... + 63095.

It is an arithmetic number, because the mean of its divisors is an integer number (50899200).

Almost surely, 2^687648479 is an apocalyptic number.

687648479 is a deficient number, since it is larger than the sum of its proper divisors (126738721).

687648479 is a wasteful number, since it uses less digits than its factorization.

687648479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12350.

The product of its digits is 16257024, while the sum is 59.

The square root of 687648479 is about 26223.0524348330. The cubic root of 687648479 is about 882.6506165417.

It can be divided in two parts, 6876 and 48479, that added together give a palindrome (55355).

The spelling of 687648479 in words is "six hundred eighty-seven million, six hundred forty-eight thousand, four hundred seventy-nine".