136140409 has 2 divisors, whose sum is σ = 136140410. Its totient is φ = 136140408.

The previous prime is 136140397. The next prime is 136140421. The reversal of 136140409 is 904041631.

136140409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (136140397) and next prime (136140421).

It can be written as a sum of positive squares in only one way, i.e., 114490000 + 21650409 = 10700^2 + 4653^2 .

It is a cyclic number.

It is not a de Polignac number, because 136140409 - 2¹⁵ = 136107641 is a prime.

It is not a weakly prime, because it can be changed into another prime (136140469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68070204 + 68070205.

It is an arithmetic number, because the mean of its divisors is an integer number (68070205).

Almost surely, 2^136140409 is an apocalyptic number.

It is an amenable number.

136140409 is a deficient number, since it is larger than the sum of its proper divisors (1).

136140409 is an equidigital number, since it uses as much as digits as its factorization.

136140409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 136140409 is about 11667.9222229153. The cubic root of 136140409 is about 514.4332332802.

The spelling of 136140409 in words is "one hundred thirty-six million, one hundred forty thousand, four hundred nine".