1189189 has 2 divisors, whose sum is σ = 1189190. Its totient is φ = 1189188.

The previous prime is 1189171. The next prime is 1189193. The reversal of 1189189 is 9819811.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1188100 + 1089 = 1090^2 + 33^2 .

It is a cyclic number.

It is not a de Polignac number, because 1189189 - 2⁷ = 1189061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1189109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594594 + 594595.

It is an arithmetic number, because the mean of its divisors is an integer number (594595).

2^1189189 is an apocalyptic number.

It is an amenable number.

1189189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1189189 is an equidigital number, since it uses as much as digits as its factorization.

1189189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 37.

The square root of 1189189 is about 1090.4994268683. The cubic root of 1189189 is about 105.9457714788.

It can be divided in two parts, 1189 and 189, that added together give a triangular number (1378 = T₅₂).

The spelling of 1189189 in words is "one million, one hundred eighty-nine thousand, one hundred eighty-nine".