138388597 has 2 divisors, whose sum is σ = 138388598. Its totient is φ = 138388596.

The previous prime is 138388573. The next prime is 138388651. The reversal of 138388597 is 795883831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132503121 + 5885476 = 11511^2 + 2426^2 .

It is a cyclic number.

It is not a de Polignac number, because 138388597 - 2¹⁵ = 138355829 is a prime.

It is a super-4 number, since 4×138388597⁴ (a number of 34 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138388697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69194298 + 69194299.

It is an arithmetic number, because the mean of its divisors is an integer number (69194299).

Almost surely, 2^138388597 is an apocalyptic number.

It is an amenable number.

138388597 is a deficient number, since it is larger than the sum of its proper divisors (1).

138388597 is an equidigital number, since it uses as much as digits as its factorization.

138388597 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 52.

The square root of 138388597 is about 11763.8682838597. The cubic root of 138388597 is about 517.2495269334.

The spelling of 138388597 in words is "one hundred thirty-eight million, three hundred eighty-eight thousand, five hundred ninety-seven".