1688814927 has 20 divisors (see below), whose sum is σ = 2542071576. Its totient is φ = 1117275120.

The previous prime is 1688814899. The next prime is 1688814937. The reversal of 1688814927 is 7294188861.

It is not a de Polignac number, because 1688814927 - 2¹² = 1688810831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1688814937) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 68968 + ... + 90189.

Almost surely, 2^1688814927 is an apocalyptic number.

1688814927 is a deficient number, since it is larger than the sum of its proper divisors (853256649).

1688814927 is a wasteful number, since it uses less digits than its factorization.

1688814927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159300 (or 159291 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 54.

The square root of 1688814927 is about 41095.1934780699. The cubic root of 1688814927 is about 1190.8599407659.

The spelling of 1688814927 in words is "one billion, six hundred eighty-eight million, eight hundred fourteen thousand, nine hundred twenty-seven".