138708165 has 8 divisors (see below), whose sum is σ = 221933088. Its totient is φ = 73977680.

The previous prime is 138708149. The next prime is 138708169. The reversal of 138708165 is 561807831.

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

It is not a de Polignac number, because 138708165 - 2⁴ = 138708149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138708169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4623591 + ... + 4623620.

It is an arithmetic number, because the mean of its divisors is an integer number (27741636).

Almost surely, 2^138708165 is an apocalyptic number.

138708165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138708165 is a deficient number, since it is larger than the sum of its proper divisors (83224923).

138708165 is an equidigital number, since it uses as much as digits as its factorization.

138708165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9247219.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 138708165 is about 11777.4430586609. The cubic root of 138708165 is about 517.6473663720.

The spelling of 138708165 in words is "one hundred thirty-eight million, seven hundred eight thousand, one hundred sixty-five".