138740273 has 8 divisors (see below), whose sum is σ = 161552448. Its totient is φ = 116676144.

The previous prime is 138740233. The next prime is 138740293. The reversal of 138740273 is 372047831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138740273 - 2¹⁶ = 138674737 is a prime.

It is a super-2 number, since 2×138740273² = 38497726704229058, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138740233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186611 + ... + 187352.

It is an arithmetic number, because the mean of its divisors is an integer number (20194056).

Almost surely, 2^138740273 is an apocalyptic number.

It is an amenable number.

138740273 is a deficient number, since it is larger than the sum of its proper divisors (22812175).

138740273 is an equidigital number, since it uses as much as digits as its factorization.

138740273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374023.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 138740273 is about 11778.8060939978. The cubic root of 138740273 is about 517.6873047548.

The spelling of 138740273 in words is "one hundred thirty-eight million, seven hundred forty thousand, two hundred seventy-three".