138733165 has 8 divisors (see below), whose sum is σ = 170979480. Its totient is φ = 107986752.

The previous prime is 138733163. The next prime is 138733169. The reversal of 138733165 is 561337831.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 51179716 + 87553449 = 7154^2 + 9357^2 .

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 138733165 - 2¹ = 138733163 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138733163) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 374770 + ... + 375139.

It is an arithmetic number, because the mean of its divisors is an integer number (21372435).

Almost surely, 2^138733165 is an apocalyptic number.

It is an amenable number.

138733165 is a deficient number, since it is larger than the sum of its proper divisors (32246315).

138733165 is an equidigital number, since it uses as much as digits as its factorization.

138733165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749951.

The product of its digits is 45360, while the sum is 37.

The square root of 138733165 is about 11778.5043617600. The cubic root of 138733165 is about 517.6784638126.

The spelling of 138733165 in words is "one hundred thirty-eight million, seven hundred thirty-three thousand, one hundred sixty-five".