1235450189 has 2 divisors, whose sum is σ = 1235450190. Its totient is φ = 1235450188.

The previous prime is 1235450179. The next prime is 1235450219. The reversal of 1235450189 is 9810545321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1014422500 + 221027689 = 31850^2 + 14867^2 .

It is an emirp because it is prime and its reverse (9810545321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1235450189 - 2⁴ = 1235450173 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1235450179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617725094 + 617725095.

It is an arithmetic number, because the mean of its divisors is an integer number (617725095).

Almost surely, 2^1235450189 is an apocalyptic number.

It is an amenable number.

1235450189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1235450189 is an equidigital number, since it uses as much as digits as its factorization.

1235450189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 1235450189 is about 35148.9713789749. The cubic root of 1235450189 is about 1073.0214738838.

The spelling of 1235450189 in words is "one billion, two hundred thirty-five million, four hundred fifty thousand, one hundred eighty-nine".