136604261 has 2 divisors, whose sum is σ = 136604262. Its totient is φ = 136604260.

The previous prime is 136604219. The next prime is 136604309. The reversal of 136604261 is 162406631.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108035236 + 28569025 = 10394^2 + 5345^2 .

It is an emirp because it is prime and its reverse (162406631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136604261 - 2¹⁰ = 136603237 is a prime.

It is a super-2 number, since 2×136604261² = 37321448246712242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136604201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68302130 + 68302131.

It is an arithmetic number, because the mean of its divisors is an integer number (68302131).

Almost surely, 2^136604261 is an apocalyptic number.

It is an amenable number.

136604261 is a deficient number, since it is larger than the sum of its proper divisors (1).

136604261 is an equidigital number, since it uses as much as digits as its factorization.

136604261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 136604261 is about 11687.7825527343. The cubic root of 136604261 is about 515.0168229022.

The spelling of 136604261 in words is "one hundred thirty-six million, six hundred four thousand, two hundred sixty-one".