687388827 has 12 divisors (see below), whose sum is σ = 949215800. Its totient is φ = 442455552.

The previous prime is 687388817. The next prime is 687388847. The reversal of 687388827 is 728883786.

It is not a de Polignac number, because 687388827 - 2⁴ = 687388811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687388817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133702 + ... + 138747.

Almost surely, 2^687388827 is an apocalyptic number.

687388827 is a deficient number, since it is larger than the sum of its proper divisors (261826973).

687388827 is a wasteful number, since it uses less digits than its factorization.

687388827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272510 (or 272481 counting only the distinct ones).

The product of its digits is 7225344, while the sum is 57.

The square root of 687388827 is about 26218.1011326145. The cubic root of 687388827 is about 882.5395080045.

The spelling of 687388827 in words is "six hundred eighty-seven million, three hundred eighty-eight thousand, eight hundred twenty-seven".