1989201 has 16 divisors (see below), whose sum is σ = 2801664. Its totient is φ = 1252944.

The previous prime is 1989193. The next prime is 1989203. The reversal of 1989201 is 1029891.

It is not a de Polignac number, because 1989201 - 2³ = 1989193 is a prime.

It is a super-3 number, since 3×1989201³ = 23613331353131662803, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1989203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8650 + ... + 8876.

It is an arithmetic number, because the mean of its divisors is an integer number (175104).

2^1989201 is an apocalyptic number.

It is an amenable number.

1989201 is a deficient number, since it is larger than the sum of its proper divisors (812463).

1989201 is a wasteful number, since it uses less digits than its factorization.

1989201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 1989201 is about 1410.3903714929. The cubic root of 1989201 is about 125.7649308316.

The spelling of 1989201 in words is "one million, nine hundred eighty-nine thousand, two hundred one".