138755291 has 8 divisors (see below), whose sum is σ = 142779984. Its totient is φ = 134745120.

The previous prime is 138755273. The next prime is 138755293. The reversal of 138755291 is 192557831.

138755291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 138755291 - 2¹⁰ = 138754267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138755293) 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, 17501 + ... + 24161.

It is an arithmetic number, because the mean of its divisors is an integer number (17847498).

Almost surely, 2^138755291 is an apocalyptic number.

138755291 is a deficient number, since it is larger than the sum of its proper divisors (4024693).

138755291 is an equidigital number, since it uses as much as digits as its factorization.

138755291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7261.

The product of its digits is 75600, while the sum is 41.

The square root of 138755291 is about 11779.4435776908. The cubic root of 138755291 is about 517.7059831752.

The spelling of 138755291 in words is "one hundred thirty-eight million, seven hundred fifty-five thousand, two hundred ninety-one".