138084589 has 4 divisors (see below), whose sum is σ = 138785724. Its totient is φ = 137383456.

The previous prime is 138084577. The next prime is 138084593. The reversal of 138084589 is 985480831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 985480831 = 383 ⋅2573057.

It can be written as a sum of positive squares in 2 ways, for example, as 128368900 + 9715689 = 11330^2 + 3117^2 .

It is a cyclic number.

It is not a de Polignac number, because 138084589 - 2⁷ = 138084461 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 (138084599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350272 + ... + 350665.

It is an arithmetic number, because the mean of its divisors is an integer number (34696431).

Almost surely, 2^138084589 is an apocalyptic number.

It is an amenable number.

138084589 is a deficient number, since it is larger than the sum of its proper divisors (701135).

138084589 is an equidigital number, since it uses as much as digits as its factorization.

138084589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701134.

The product of its (nonzero) digits is 276480, while the sum is 46.

The square root of 138084589 is about 11750.9399198532. The cubic root of 138084589 is about 516.8704897288.

The spelling of 138084589 in words is "one hundred thirty-eight million, eighty-four thousand, five hundred eighty-nine".