1688591107 has 6 divisors (see below), whose sum is σ = 1964279508. Its totient is φ = 1447363764.

The previous prime is 1688591063. The next prime is 1688591119. The reversal of 1688591107 is 7011958861.

It is not a de Polignac number, because 1688591107 - 2²³ = 1680202499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1688591197) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17230473 + ... + 17230570.

It is an arithmetic number, because the mean of its divisors is an integer number (327379918).

Almost surely, 2^1688591107 is an apocalyptic number.

1688591107 is a deficient number, since it is larger than the sum of its proper divisors (275688401).

1688591107 is an equidigital number, since it uses as much as digits as its factorization.

1688591107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34461057 (or 34461050 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 46.

The square root of 1688591107 is about 41092.4701983222. The cubic root of 1688591107 is about 1190.8073298999.

The spelling of 1688591107 in words is "one billion, six hundred eighty-eight million, five hundred ninety-one thousand, one hundred seven".