1236230189 has 2 divisors, whose sum is σ = 1236230190. Its totient is φ = 1236230188.

The previous prime is 1236230173. The next prime is 1236230201. The reversal of 1236230189 is 9810326321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 834227689 + 402002500 = 28883^2 + 20050^2 .

It is a cyclic number.

It is not a de Polignac number, because 1236230189 - 2⁴ = 1236230173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1236230389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 618115094 + 618115095.

It is an arithmetic number, because the mean of its divisors is an integer number (618115095).

Almost surely, 2^1236230189 is an apocalyptic number.

It is an amenable number.

1236230189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1236230189 is an equidigital number, since it uses as much as digits as its factorization.

1236230189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 1236230189 is about 35160.0652587563. The cubic root of 1236230189 is about 1073.2472433190.

The spelling of 1236230189 in words is "one billion, two hundred thirty-six million, two hundred thirty thousand, one hundred eighty-nine".