138603389 has 2 divisors, whose sum is σ = 138603390. Its totient is φ = 138603388.

The previous prime is 138603343. The next prime is 138603457. The reversal of 138603389 is 983306831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113252164 + 25351225 = 10642^2 + 5035^2 .

It is a cyclic number.

It is not a de Polignac number, because 138603389 - 2⁸ = 138603133 is a prime.

It is a Chen prime.

It is equal to p_7837619 and since 138603389 and 7837619 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138603089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69301694 + 69301695.

It is an arithmetic number, because the mean of its divisors is an integer number (69301695).

Almost surely, 2^138603389 is an apocalyptic number.

It is an amenable number.

138603389 is a deficient number, since it is larger than the sum of its proper divisors (1).

138603389 is an equidigital number, since it uses as much as digits as its factorization.

138603389 is an odious number, because the sum of its binary digits is odd.

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

The square root of 138603389 is about 11772.9940541903. The cubic root of 138603389 is about 517.5169950933.

The spelling of 138603389 in words is "one hundred thirty-eight million, six hundred three thousand, three hundred eighty-nine".