138036389 has 4 divisors (see below), whose sum is σ = 138179520. Its totient is φ = 137893260.

The previous prime is 138036373. The next prime is 138036421. The reversal of 138036389 is 983630831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 138036389 - 2⁴ = 138036373 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 (138036319) 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, 70109 + ... + 72050.

It is an arithmetic number, because the mean of its divisors is an integer number (34544880).

Almost surely, 2^138036389 is an apocalyptic number.

It is an amenable number.

138036389 is a deficient number, since it is larger than the sum of its proper divisors (143131).

138036389 is an equidigital number, since it uses as much as digits as its factorization.

138036389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143130.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 138036389 is about 11748.8888410777. Note that the first 4 decimals coincide. The cubic root of 138036389 is about 516.8103428843.

The spelling of 138036389 in words is "one hundred thirty-eight million, thirty-six thousand, three hundred eighty-nine".