1989106 has 12 divisors (see below), whose sum is σ = 3470958. Its totient is φ = 852432.

The previous prime is 1989101. The next prime is 1989107. The reversal of 1989106 is 6019891.

It can be written as a sum of positive squares in only one way, i.e., 1713481 + 275625 = 1309^2 + 525^2 .

It is not an unprimeable number, because it can be changed into a prime (1989101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10051 + ... + 10246.

2^1989106 is an apocalyptic number.

1989106 is a deficient number, since it is larger than the sum of its proper divisors (1481852).

1989106 is a wasteful number, since it uses less digits than its factorization.

1989106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20313 (or 20306 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 1989106 is about 1410.3566924718. The cubic root of 1989106 is about 125.7629287114.

It can be divided in two parts, 198910 and 6, that added together give a square (198916 = 446²).

The spelling of 1989106 in words is "one million, nine hundred eighty-nine thousand, one hundred six".