138890795 has 4 divisors (see below), whose sum is σ = 166668960. Its totient is φ = 111112632.

The previous prime is 138890771. The next prime is 138890803. The reversal of 138890795 is 597098831.

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 138890795 - 2¹⁰ = 138889771 is a prime.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13889075 + ... + 13889084.

It is an arithmetic number, because the mean of its divisors is an integer number (41667240).

Almost surely, 2^138890795 is an apocalyptic number.

138890795 is a deficient number, since it is larger than the sum of its proper divisors (27778165).

138890795 is an equidigital number, since it uses as much as digits as its factorization.

138890795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27778164.

The product of its (nonzero) digits is 544320, while the sum is 50.

The square root of 138890795 is about 11785.1938889439. The cubic root of 138890795 is about 517.8744534070.

The spelling of 138890795 in words is "one hundred thirty-eight million, eight hundred ninety thousand, seven hundred ninety-five".