139049189 has 2 divisors, whose sum is σ = 139049190. Its totient is φ = 139049188.

The previous prime is 139049161. The next prime is 139049221. The reversal of 139049189 is 981940931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106956964 + 32092225 = 10342^2 + 5665^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139049189 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 (139049689) 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, 69524594 + 69524595.

It is an arithmetic number, because the mean of its divisors is an integer number (69524595).

Almost surely, 2^139049189 is an apocalyptic number.

It is an amenable number.

139049189 is a deficient number, since it is larger than the sum of its proper divisors (1).

139049189 is an equidigital number, since it uses as much as digits as its factorization.

139049189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 139049189 is about 11791.9120162932. The cubic root of 139049189 is about 518.0712436111.

The spelling of 139049189 in words is "one hundred thirty-nine million, forty-nine thousand, one hundred eighty-nine".