12136609 has 2 divisors, whose sum is σ = 12136610. Its totient is φ = 12136608.

The previous prime is 12136601. The next prime is 12136613. The reversal of 12136609 is 90663121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9150625 + 2985984 = 3025^2 + 1728^2 .

It is an emirp because it is prime and its reverse (90663121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12136609 - 2³ = 12136601 is a prime.

It is not a weakly prime, because it can be changed into another prime (12136601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6068304 + 6068305.

It is an arithmetic number, because the mean of its divisors is an integer number (6068305).

Almost surely, 2^12136609 is an apocalyptic number.

It is an amenable number.

12136609 is a deficient number, since it is larger than the sum of its proper divisors (1).

12136609 is an equidigital number, since it uses as much as digits as its factorization.

12136609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 12136609 is about 3483.7636257358. The cubic root of 12136609 is about 229.8083406494.

The spelling of 12136609 in words is "twelve million, one hundred thirty-six thousand, six hundred nine".