138810775 has 12 divisors (see below), whose sum is σ = 175044600. Its totient is φ = 109165280.

The previous prime is 138810769. The next prime is 138810799. The reversal of 138810775 is 577018831.

It is a happy number.

It is not a de Polignac number, because 138810775 - 2³ = 138810767 is a prime.

It is a super-2 number, since 2×138810775² = 38536862512201250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45580 + ... + 48529.

It is an arithmetic number, because the mean of its divisors is an integer number (14587050).

Almost surely, 2^138810775 is an apocalyptic number.

138810775 is a deficient number, since it is larger than the sum of its proper divisors (36233825).

138810775 is an equidigital number, since it uses as much as digits as its factorization.

138810775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94178 (or 94173 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 40.

The square root of 138810775 is about 11781.7984620346. The cubic root of 138810775 is about 517.7749789128.

The spelling of 138810775 in words is "one hundred thirty-eight million, eight hundred ten thousand, seven hundred seventy-five".