138214577 has 2 divisors, whose sum is σ = 138214578. Its totient is φ = 138214576.

The previous prime is 138214541. The next prime is 138214579. The reversal of 138214577 is 775412831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113124496 + 25090081 = 10636^2 + 5009^2 .

It is an emirp because it is prime and its reverse (775412831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138214577 - 2²⁴ = 121437361 is a prime.

Together with 138214579, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138214577.

It is not a weakly prime, because it can be changed into another prime (138214579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69107288 + 69107289.

It is an arithmetic number, because the mean of its divisors is an integer number (69107289).

Almost surely, 2^138214577 is an apocalyptic number.

It is an amenable number.

138214577 is a deficient number, since it is larger than the sum of its proper divisors (1).

138214577 is an equidigital number, since it uses as much as digits as its factorization.

138214577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 38.

The square root of 138214577 is about 11756.4695806182. The cubic root of 138214577 is about 517.0326267934.

The spelling of 138214577 in words is "one hundred thirty-eight million, two hundred fourteen thousand, five hundred seventy-seven".