138032273 has 2 divisors, whose sum is σ = 138032274. Its totient is φ = 138032272.

The previous prime is 138032263. The next prime is 138032287. The reversal of 138032273 is 372230831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136702864 + 1329409 = 11692^2 + 1153^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138032273 is a prime.

It is not a weakly prime, because it can be changed into another prime (138032233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69016136 + 69016137.

It is an arithmetic number, because the mean of its divisors is an integer number (69016137).

Almost surely, 2^138032273 is an apocalyptic number.

It is an amenable number.

138032273 is a deficient number, since it is larger than the sum of its proper divisors (1).

138032273 is an equidigital number, since it uses as much as digits as its factorization.

138032273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 138032273 is about 11748.7136742709. The cubic root of 138032273 is about 516.8052060444.

The spelling of 138032273 in words is "one hundred thirty-eight million, thirty-two thousand, two hundred seventy-three".