138614389 has 2 divisors, whose sum is σ = 138614390. Its totient is φ = 138614388.

The previous prime is 138614383. The next prime is 138614407. The reversal of 138614389 is 983416831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138462289 + 152100 = 11767^2 + 390^2 .

It is an emirp because it is prime and its reverse (983416831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138614389 - 2²¹ = 136517237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138614383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69307194 + 69307195.

It is an arithmetic number, because the mean of its divisors is an integer number (69307195).

Almost surely, 2^138614389 is an apocalyptic number.

It is an amenable number.

138614389 is a deficient number, since it is larger than the sum of its proper divisors (1).

138614389 is an equidigital number, since it uses as much as digits as its factorization.

138614389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 43.

The square root of 138614389 is about 11773.4612158023. The cubic root of 138614389 is about 517.5306853221.

The spelling of 138614389 in words is "one hundred thirty-eight million, six hundred fourteen thousand, three hundred eighty-nine".