138775115 has 4 divisors (see below), whose sum is σ = 166530144. Its totient is φ = 111020088.

The previous prime is 138775099. The next prime is 138775129. The reversal of 138775115 is 511577831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138775115 - 2⁴ = 138775099 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13877507 + ... + 13877516.

It is an arithmetic number, because the mean of its divisors is an integer number (41632536).

Almost surely, 2^138775115 is an apocalyptic number.

138775115 is a deficient number, since it is larger than the sum of its proper divisors (27755029).

138775115 is an equidigital number, since it uses as much as digits as its factorization.

138775115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27755028.

The product of its digits is 29400, while the sum is 38.

The square root of 138775115 is about 11780.2850135300. The cubic root of 138775115 is about 517.7306369250.

The spelling of 138775115 in words is "one hundred thirty-eight million, seven hundred seventy-five thousand, one hundred fifteen".