136844459 has 2 divisors, whose sum is σ = 136844460. Its totient is φ = 136844458.

The previous prime is 136844437. The next prime is 136844473. The reversal of 136844459 is 954448631.

It is a strong prime.

It is an emirp because it is prime and its reverse (954448631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136844459 is a prime.

It is not a weakly prime, because it can be changed into another prime (136844419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68422229 + 68422230.

It is an arithmetic number, because the mean of its divisors is an integer number (68422230).

Almost surely, 2^136844459 is an apocalyptic number.

136844459 is a deficient number, since it is larger than the sum of its proper divisors (1).

136844459 is an equidigital number, since it uses as much as digits as its factorization.

136844459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 44.

The square root of 136844459 is about 11698.0536415252. The cubic root of 136844459 is about 515.3185059648.

The spelling of 136844459 in words is "one hundred thirty-six million, eight hundred forty-four thousand, four hundred fifty-nine".