136267321 has 2 divisors, whose sum is σ = 136267322. Its totient is φ = 136267320.

The previous prime is 136267319. The next prime is 136267333. The reversal of 136267321 is 123762631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108388921 + 27878400 = 10411^2 + 5280^2 .

It is a cyclic number.

It is not a de Polignac number, because 136267321 - 2¹ = 136267319 is a prime.

Together with 136267319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (136267381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68133660 + 68133661.

It is an arithmetic number, because the mean of its divisors is an integer number (68133661).

Almost surely, 2^136267321 is an apocalyptic number.

It is an amenable number.

136267321 is a deficient number, since it is larger than the sum of its proper divisors (1).

136267321 is an equidigital number, since it uses as much as digits as its factorization.

136267321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 31.

The square root of 136267321 is about 11673.3594564718. The cubic root of 136267321 is about 514.5930375932.

The spelling of 136267321 in words is "one hundred thirty-six million, two hundred sixty-seven thousand, three hundred twenty-one".