1138189 has 4 divisors (see below), whose sum is σ = 1225756. Its totient is φ = 1050624.

The previous prime is 1138183. The next prime is 1138213. The reversal of 1138189 is 9818311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 514089 + 624100 = 717^2 + 790^2 .

It is a cyclic number.

It is not a de Polignac number, because 1138189 - 2⁷ = 1138061 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1138189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138183) 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, 43764 + ... + 43789.

It is an arithmetic number, because the mean of its divisors is an integer number (306439).

2^1138189 is an apocalyptic number.

It is an amenable number.

1138189 is a deficient number, since it is larger than the sum of its proper divisors (87567).

1138189 is an equidigital number, since it uses as much as digits as its factorization.

1138189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87566.

The product of its digits is 1728, while the sum is 31.

The square root of 1138189 is about 1066.8594096693. The cubic root of 1138189 is about 104.4090461082.

The spelling of 1138189 in words is "one million, one hundred thirty-eight thousand, one hundred eighty-nine".