139132109 has 2 divisors, whose sum is σ = 139132110. Its totient is φ = 139132108.

The previous prime is 139132057. The next prime is 139132127. The reversal of 139132109 is 901231931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132756484 + 6375625 = 11522^2 + 2525^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139132109 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 (139132909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69566054 + 69566055.

It is an arithmetic number, because the mean of its divisors is an integer number (69566055).

Almost surely, 2^139132109 is an apocalyptic number.

It is an amenable number.

139132109 is a deficient number, since it is larger than the sum of its proper divisors (1).

139132109 is an equidigital number, since it uses as much as digits as its factorization.

139132109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 139132109 is about 11795.4274615208. The cubic root of 139132109 is about 518.1742046122.

The spelling of 139132109 in words is "one hundred thirty-nine million, one hundred thirty-two thousand, one hundred nine".