1689631105 has 16 divisors (see below), whose sum is σ = 2160013824. Its totient is φ = 1264377600.

The previous prime is 1689631103. The next prime is 1689631109. The reversal of 1689631105 is 5011369861.

It is not a de Polignac number, because 1689631105 - 2¹ = 1689631103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1689631103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47121 + ... + 74830.

It is an arithmetic number, because the mean of its divisors is an integer number (135000864).

Almost surely, 2^1689631105 is an apocalyptic number.

It is an amenable number.

1689631105 is a deficient number, since it is larger than the sum of its proper divisors (470382719).

1689631105 is a wasteful number, since it uses less digits than its factorization.

1689631105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122136.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 1689631105 is about 41105.1226126380. The cubic root of 1689631105 is about 1191.0517512350.

The spelling of 1689631105 in words is "one billion, six hundred eighty-nine million, six hundred thirty-one thousand, one hundred five".