123606389 has 2 divisors, whose sum is σ = 123606390. Its totient is φ = 123606388.

The previous prime is 123606367. The next prime is 123606391. The reversal of 123606389 is 983606321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61858225 + 61748164 = 7865^2 + 7858^2 .

It is an emirp because it is prime and its reverse (983606321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123606389 - 2¹² = 123602293 is a prime.

Together with 123606391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123606359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61803194 + 61803195.

It is an arithmetic number, because the mean of its divisors is an integer number (61803195).

Almost surely, 2^123606389 is an apocalyptic number.

It is an amenable number.

123606389 is a deficient number, since it is larger than the sum of its proper divisors (1).

123606389 is an equidigital number, since it uses as much as digits as its factorization.

123606389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 123606389 is about 11117.8410224288. The cubic root of 123606389 is about 498.1349034805.

The spelling of 123606389 in words is "one hundred twenty-three million, six hundred six thousand, three hundred eighty-nine".