138750655 has 8 divisors (see below), whose sum is σ = 167090832. Its totient is φ = 110607168.

The previous prime is 138750649. The next prime is 138750659. The reversal of 138750655 is 556057831.

138750655 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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138750655 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138750659) 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, 47614 + ... + 50443.

It is an arithmetic number, because the mean of its divisors is an integer number (20886354).

Almost surely, 2^138750655 is an apocalyptic number.

138750655 is a deficient number, since it is larger than the sum of its proper divisors (28340177).

138750655 is an equidigital number, since it uses as much as digits as its factorization.

138750655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98345.

The product of its (nonzero) digits is 126000, while the sum is 40.

The square root of 138750655 is about 11779.2467925585. The cubic root of 138750655 is about 517.7002173610.

The spelling of 138750655 in words is "one hundred thirty-eight million, seven hundred fifty thousand, six hundred fifty-five".