138705065 has 8 divisors (see below), whose sum is σ = 173683008. Its totient is φ = 106139440.

The previous prime is 138705059. The next prime is 138705089. The reversal of 138705065 is 560507831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138705065 - 2⁶ = 138705001 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 7 ways as a sum of consecutive naturals, for example, 602951 + ... + 603180.

It is an arithmetic number, because the mean of its divisors is an integer number (21710376).

Almost surely, 2^138705065 is an apocalyptic number.

It is an amenable number.

138705065 is a deficient number, since it is larger than the sum of its proper divisors (34977943).

138705065 is a wasteful number, since it uses less digits than its factorization.

138705065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206159.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 138705065 is about 11777.3114504118. The cubic root of 138705065 is about 517.6435100290.

It can be divided in two parts, 13 and 8705065, that added together give a palindrome (8705078).

The spelling of 138705065 in words is "one hundred thirty-eight million, seven hundred five thousand, sixty-five".