136729213 has 2 divisors, whose sum is σ = 136729214. Its totient is φ = 136729212.

The previous prime is 136729211. The next prime is 136729217. The reversal of 136729213 is 312927631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129095044 + 7634169 = 11362^2 + 2763^2 .

It is an emirp because it is prime and its reverse (312927631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136729213 - 2¹ = 136729211 is a prime.

Together with 136729211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136729211) 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, 68364606 + 68364607.

It is an arithmetic number, because the mean of its divisors is an integer number (68364607).

Almost surely, 2^136729213 is an apocalyptic number.

It is an amenable number.

136729213 is a deficient number, since it is larger than the sum of its proper divisors (1).

136729213 is an equidigital number, since it uses as much as digits as its factorization.

136729213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 34.

The square root of 136729213 is about 11693.1267418086. The cubic root of 136729213 is about 515.1738037814.

The spelling of 136729213 in words is "one hundred thirty-six million, seven hundred twenty-nine thousand, two hundred thirteen".