1200000040189 has 2 divisors, whose sum is σ = 1200000040190. Its totient is φ = 1200000040188.

The previous prime is 1200000040177. The next prime is 1200000040219. The reversal of 1200000040189 is 9810400000021.

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., 945091176964 + 254908863225 = 972158^2 + 504885^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200000040189 - 2⁵ = 1200000040157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200000040139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600000020094 + 600000020095.

It is an arithmetic number, because the mean of its divisors is an integer number (600000020095).

Almost surely, 2^{1200000040189} is an apocalyptic number.

It is an amenable number.

1200000040189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200000040189 is an equidigital number, since it uses as much as digits as its factorization.

1200000040189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 1200000040189 in words is "one trillion, two hundred billion, forty thousand, one hundred eighty-nine".