138588839 has 2 divisors, whose sum is σ = 138588840. Its totient is φ = 138588838.

The previous prime is 138588803. The next prime is 138588911. The reversal of 138588839 is 938885831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138588839 - 2²⁴ = 121811623 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 (138584839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69294419 + 69294420.

It is an arithmetic number, because the mean of its divisors is an integer number (69294420).

Almost surely, 2^138588839 is an apocalyptic number.

138588839 is a deficient number, since it is larger than the sum of its proper divisors (1).

138588839 is an equidigital number, since it uses as much as digits as its factorization.

138588839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1658880, while the sum is 53.

The square root of 138588839 is about 11772.3760983074. The cubic root of 138588839 is about 517.4988855414.

The spelling of 138588839 in words is "one hundred thirty-eight million, five hundred eighty-eight thousand, eight hundred thirty-nine".