136220393 has 2 divisors, whose sum is σ = 136220394. Its totient is φ = 136220392.

The previous prime is 136220389. The next prime is 136220437. The reversal of 136220393 is 393022631.

136220393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81504784 + 54715609 = 9028^2 + 7397^2 .

It is a cyclic number.

It is not a de Polignac number, because 136220393 - 2² = 136220389 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (136220353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68110196 + 68110197.

It is an arithmetic number, because the mean of its divisors is an integer number (68110197).

Almost surely, 2^136220393 is an apocalyptic number.

It is an amenable number.

136220393 is a deficient number, since it is larger than the sum of its proper divisors (1).

136220393 is an equidigital number, since it uses as much as digits as its factorization.

136220393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 136220393 is about 11671.3492364850. The cubic root of 136220393 is about 514.5339586334.

The spelling of 136220393 in words is "one hundred thirty-six million, two hundred twenty thousand, three hundred ninety-three".