142787189 has 2 divisors, whose sum is σ = 142787190. Its totient is φ = 142787188.

The previous prime is 142787179. The next prime is 142787221. The reversal of 142787189 is 981787241.

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., 99002500 + 43784689 = 9950^2 + 6617^2 .

It is an emirp because it is prime and its reverse (981787241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142787189 - 2⁴ = 142787173 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142787119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71393594 + 71393595.

It is an arithmetic number, because the mean of its divisors is an integer number (71393595).

Almost surely, 2^142787189 is an apocalyptic number.

It is an amenable number.

142787189 is a deficient number, since it is larger than the sum of its proper divisors (1).

142787189 is an equidigital number, since it uses as much as digits as its factorization.

142787189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 47.

The square root of 142787189 is about 11949.3593552123. The cubic root of 142787189 is about 522.6726171270.

The spelling of 142787189 in words is "one hundred forty-two million, seven hundred eighty-seven thousand, one hundred eighty-nine".