138547273 has 2 divisors, whose sum is σ = 138547274. Its totient is φ = 138547272.

The previous prime is 138547267. The next prime is 138547289. The reversal of 138547273 is 372745831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76247824 + 62299449 = 8732^2 + 7893^2 .

It is a cyclic number.

It is not a de Polignac number, because 138547273 - 2¹³ = 138539081 is a prime.

It is not a weakly prime, because it can be changed into another prime (138547243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69273636 + 69273637.

It is an arithmetic number, because the mean of its divisors is an integer number (69273637).

Almost surely, 2^138547273 is an apocalyptic number.

It is an amenable number.

138547273 is a deficient number, since it is larger than the sum of its proper divisors (1).

138547273 is an equidigital number, since it uses as much as digits as its factorization.

138547273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 40.

The square root of 138547273 is about 11770.6105619037. The cubic root of 138547273 is about 517.4471437377.

The spelling of 138547273 in words is "one hundred thirty-eight million, five hundred forty-seven thousand, two hundred seventy-three".