1989115 has 16 divisors (see below), whose sum is σ = 2532096. Its totient is φ = 1497600.

The previous prime is 1989107. The next prime is 1989131. The reversal of 1989115 is 5119891.

It is not a de Polignac number, because 1989115 - 2³ = 1989107 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6199 + ... + 6511.

It is an arithmetic number, because the mean of its divisors is an integer number (158256).

2^1989115 is an apocalyptic number.

1989115 is a deficient number, since it is larger than the sum of its proper divisors (542981).

1989115 is a wasteful number, since it uses less digits than its factorization.

1989115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390.

The product of its digits is 3240, while the sum is 34.

The square root of 1989115 is about 1410.3598831504. The cubic root of 1989115 is about 125.7631183887.

It can be divided in two parts, 198911 and 5, that added together give a square (198916 = 446²).

The spelling of 1989115 in words is "one million, nine hundred eighty-nine thousand, one hundred fifteen".