138865175 has 6 divisors (see below), whose sum is σ = 172192848. Its totient is φ = 111092120.

The previous prime is 138865171. The next prime is 138865193. The reversal of 138865175 is 571568831.

It is not a de Polignac number, because 138865175 - 2² = 138865171 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 (138865171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2777279 + ... + 2777328.

It is an arithmetic number, because the mean of its divisors is an integer number (28698808).

Almost surely, 2^138865175 is an apocalyptic number.

138865175 is a deficient number, since it is larger than the sum of its proper divisors (33327673).

138865175 is an equidigital number, since it uses as much as digits as its factorization.

138865175 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5554617 (or 5554612 counting only the distinct ones).

The product of its digits is 201600, while the sum is 44.

The square root of 138865175 is about 11784.1068817285. The cubic root of 138865175 is about 517.8426088215.

The spelling of 138865175 in words is "one hundred thirty-eight million, eight hundred sixty-five thousand, one hundred seventy-five".