1889189 has 4 divisors (see below), whose sum is σ = 1988640. Its totient is φ = 1789740.

The previous prime is 1889177. The next prime is 1889191. The reversal of 1889189 is 9819881.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1889189 - 2⁸ = 1888933 is a prime.

It is a super-3 number, since 3×1889189³ = 20227745428333974807, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1889389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49697 + ... + 49734.

It is an arithmetic number, because the mean of its divisors is an integer number (497160).

2^1889189 is an apocalyptic number.

1889189 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1889189 is a deficient number, since it is larger than the sum of its proper divisors (99451).

1889189 is an equidigital number, since it uses as much as digits as its factorization.

1889189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99450.

The product of its digits is 41472, while the sum is 44.

The square root of 1889189 is about 1374.4777189900. The cubic root of 1889189 is about 123.6208720072.

The spelling of 1889189 in words is "one million, eight hundred eighty-nine thousand, one hundred eighty-nine".