687888927 has 12 divisors (see below), whose sum is σ = 1083946344. Its totient is φ = 416902320.

The previous prime is 687888917. The next prime is 687888973. The reversal of 687888927 is 729888786.

It is not a de Polignac number, because 687888927 - 2¹¹ = 687886879 is a prime.

It is a super-2 number, since 2×687888927² = 946382351778422658, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687888917) 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, 3474088 + ... + 3474285.

It is an arithmetic number, because the mean of its divisors is an integer number (90328862).

Almost surely, 2^687888927 is an apocalyptic number.

687888927 is a deficient number, since it is larger than the sum of its proper divisors (396057417).

687888927 is a wasteful number, since it uses less digits than its factorization.

687888927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6948390 (or 6948387 counting only the distinct ones).

The product of its digits is 21676032, while the sum is 63.

The square root of 687888927 is about 26227.6367025319. The cubic root of 687888927 is about 882.7534824923.

The spelling of 687888927 in words is "six hundred eighty-seven million, eight hundred eighty-eight thousand, nine hundred twenty-seven".