136766549 has 2 divisors, whose sum is σ = 136766550. Its totient is φ = 136766548.

The previous prime is 136766537. The next prime is 136766557. The reversal of 136766549 is 945667631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125843524 + 10923025 = 11218^2 + 3305^2 .

It is a cyclic number.

It is not a de Polignac number, because 136766549 - 2¹² = 136762453 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136766599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68383274 + 68383275.

It is an arithmetic number, because the mean of its divisors is an integer number (68383275).

Almost surely, 2^136766549 is an apocalyptic number.

It is an amenable number.

136766549 is a deficient number, since it is larger than the sum of its proper divisors (1).

136766549 is an equidigital number, since it uses as much as digits as its factorization.

136766549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 47.

The square root of 136766549 is about 11694.7231262651. The cubic root of 136766549 is about 515.2206915391.

The spelling of 136766549 in words is "one hundred thirty-six million, seven hundred sixty-six thousand, five hundred forty-nine".