138371765 has 8 divisors (see below), whose sum is σ = 189767040. Its totient is φ = 94883472.

The previous prime is 138371759. The next prime is 138371791. The reversal of 138371765 is 567173831.

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

It is a cyclic number.

It is not a de Polignac number, because 138371765 - 2²⁴ = 121594549 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1976705 + ... + 1976774.

It is an arithmetic number, because the mean of its divisors is an integer number (23720880).

Almost surely, 2^138371765 is an apocalyptic number.

It is an amenable number.

138371765 is a deficient number, since it is larger than the sum of its proper divisors (51395275).

138371765 is an equidigital number, since it uses as much as digits as its factorization.

138371765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3953491.

The product of its digits is 105840, while the sum is 41.

The square root of 138371765 is about 11763.1528511705. The cubic root of 138371765 is about 517.2285553186.

The spelling of 138371765 in words is "one hundred thirty-eight million, three hundred seventy-one thousand, seven hundred sixty-five".