1688489163 has 12 divisors (see below), whose sum is σ = 2440626240. Its totient is φ = 1124876016.

The previous prime is 1688489149. The next prime is 1688489171. The reversal of 1688489163 is 3619848861.

It is not a de Polignac number, because 1688489163 - 2⁹ = 1688488651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1688489063) 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, 51483 + ... + 77636.

It is an arithmetic number, because the mean of its divisors is an integer number (203385520).

Almost surely, 2^1688489163 is an apocalyptic number.

1688489163 is a deficient number, since it is larger than the sum of its proper divisors (752137077).

1688489163 is a wasteful number, since it uses less digits than its factorization.

1688489163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130578 (or 130575 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The square root of 1688489163 is about 41091.2297576989. The cubic root of 1688489163 is about 1190.7833655221.

The spelling of 1688489163 in words is "one billion, six hundred eighty-eight million, four hundred eighty-nine thousand, one hundred sixty-three".