139066189 has 4 divisors (see below), whose sum is σ = 139453920. Its totient is φ = 138678460.

The previous prime is 139066183. The next prime is 139066201. The reversal of 139066189 is 981660931.

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: 981660931 = 7547 ⋅130073.

It is a cyclic number.

It is not a de Polignac number, because 139066189 - 2³ = 139066181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139066181) 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, 193327 + ... + 194044.

It is an arithmetic number, because the mean of its divisors is an integer number (34863480).

Almost surely, 2^139066189 is an apocalyptic number.

It is an amenable number.

139066189 is a deficient number, since it is larger than the sum of its proper divisors (387731).

139066189 is an equidigital number, since it uses as much as digits as its factorization.

139066189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387730.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 139066189 is about 11792.6328273206. The cubic root of 139066189 is about 518.0923556897.

The spelling of 139066189 in words is "one hundred thirty-nine million, sixty-six thousand, one hundred eighty-nine".