138344065 has 8 divisors (see below), whose sum is σ = 171737640. Its totient is φ = 106858752.

The previous prime is 138344053. The next prime is 138344069. The reversal of 138344065 is 560443831.

It is a happy number.

138344065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 55606849 + 82737216 = 7457^2 + 9096^2 .

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 138344065 - 2¹⁵ = 138311297 is a prime.

It is a super-3 number, since 3×138344065³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 138344065.

It is not an unprimeable number, because it can be changed into a prime (138344069) 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, 476904 + ... + 477193.

It is an arithmetic number, because the mean of its divisors is an integer number (21467205).

Almost surely, 2^138344065 is an apocalyptic number.

It is an amenable number.

138344065 is a deficient number, since it is larger than the sum of its proper divisors (33393575).

138344065 is an equidigital number, since it uses as much as digits as its factorization.

138344065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954131.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 138344065 is about 11761.9753868132. The cubic root of 138344065 is about 517.1940391557.

Adding to 138344065 its reverse (560443831), we get a palindrome (698787896).

The spelling of 138344065 in words is "one hundred thirty-eight million, three hundred forty-four thousand, sixty-five".