142108189 has 2 divisors, whose sum is σ = 142108190. Its totient is φ = 142108188.

The previous prime is 142108171. The next prime is 142108199. The reversal of 142108189 is 981801241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141205689 + 902500 = 11883^2 + 950^2 .

It is a cyclic number.

It is not a de Polignac number, because 142108189 - 2⁹ = 142107677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142108159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71054094 + 71054095.

It is an arithmetic number, because the mean of its divisors is an integer number (71054095).

Almost surely, 2^142108189 is an apocalyptic number.

It is an amenable number.

142108189 is a deficient number, since it is larger than the sum of its proper divisors (1).

142108189 is an equidigital number, since it uses as much as digits as its factorization.

142108189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 34.

The square root of 142108189 is about 11920.9139330842. The cubic root of 142108189 is about 521.8428070500.

The spelling of 142108189 in words is "one hundred forty-two million, one hundred eight thousand, one hundred eighty-nine".