140286189 has 4 divisors (see below), whose sum is σ = 187048256. Its totient is φ = 93524124.

The previous prime is 140286187. The next prime is 140286221. The reversal of 140286189 is 981682041.

140286189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 981682041 = 3 ⋅327227347.

It is not a de Polignac number, because 140286189 - 2¹ = 140286187 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140286187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23381029 + ... + 23381034.

It is an arithmetic number, because the mean of its divisors is an integer number (46762064).

Almost surely, 2^140286189 is an apocalyptic number.

It is an amenable number.

140286189 is a deficient number, since it is larger than the sum of its proper divisors (46762067).

140286189 is an equidigital number, since it uses as much as digits as its factorization.

140286189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46762066.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 140286189 is about 11844.2470845554. The cubic root of 140286189 is about 519.6029871507.

The spelling of 140286189 in words is "one hundred forty million, two hundred eighty-six thousand, one hundred eighty-nine".