138007273 has 4 divisors (see below), whose sum is σ = 138067200. Its totient is φ = 137947348.

The previous prime is 138007267. The next prime is 138007277. The reversal of 138007273 is 372700831.

138007273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 372700831 = 4259 ⋅87509.

It is a cyclic number.

It is not a de Polignac number, because 138007273 - 2¹⁷ = 137876201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138007277) 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, 26365 + ... + 31162.

It is an arithmetic number, because the mean of its divisors is an integer number (34516800).

Almost surely, 2^138007273 is an apocalyptic number.

It is an amenable number.

138007273 is a deficient number, since it is larger than the sum of its proper divisors (59927).

138007273 is an equidigital number, since it uses as much as digits as its factorization.

138007273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59926.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 138007273 is about 11747.6496798296. The cubic root of 138007273 is about 516.7740034134.

The spelling of 138007273 in words is "one hundred thirty-eight million, seven thousand, two hundred seventy-three".