138287365 has 4 divisors (see below), whose sum is σ = 165944844. Its totient is φ = 110629888.

The previous prime is 138287363. The next prime is 138287393. The reversal of 138287365 is 563782831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16008001 + 122279364 = 4001^2 + 11058^2 .

It is a cyclic number.

It is not a de Polignac number, because 138287365 - 2¹ = 138287363 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138287363) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 13828732 + ... + 13828741.

It is an arithmetic number, because the mean of its divisors is an integer number (41486211).

Almost surely, 2^138287365 is an apocalyptic number.

It is an amenable number.

138287365 is a deficient number, since it is larger than the sum of its proper divisors (27657479).

138287365 is an equidigital number, since it uses as much as digits as its factorization.

138287365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27657478.

The product of its digits is 241920, while the sum is 43.

The square root of 138287365 is about 11759.5648303838. The cubic root of 138287365 is about 517.1233725676.

The spelling of 138287365 in words is "one hundred thirty-eight million, two hundred eighty-seven thousand, three hundred sixty-five".