138836597 has 2 divisors, whose sum is σ = 138836598. Its totient is φ = 138836596.

The previous prime is 138836567. The next prime is 138836609. The reversal of 138836597 is 795638831.

It is a happy number.

138836597 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122788561 + 16048036 = 11081^2 + 4006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138836597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138836557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69418298 + 69418299.

It is an arithmetic number, because the mean of its divisors is an integer number (69418299).

Almost surely, 2^138836597 is an apocalyptic number.

It is an amenable number.

138836597 is a deficient number, since it is larger than the sum of its proper divisors (1).

138836597 is an equidigital number, since it uses as much as digits as its factorization.

138836597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 50.

The square root of 138836597 is about 11782.8942539598. The cubic root of 138836597 is about 517.8070829445.

The spelling of 138836597 in words is "one hundred thirty-eight million, eight hundred thirty-six thousand, five hundred ninety-seven".