136243277 has 2 divisors, whose sum is σ = 136243278. Its totient is φ = 136243276.

The previous prime is 136243273. The next prime is 136243279. The reversal of 136243277 is 772342631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94692361 + 41550916 = 9731^2 + 6446^2 .

It is a cyclic number.

It is not a de Polignac number, because 136243277 - 2² = 136243273 is a prime.

Together with 136243279, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136243273) 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, 68121638 + 68121639.

It is an arithmetic number, because the mean of its divisors is an integer number (68121639).

Almost surely, 2^136243277 is an apocalyptic number.

It is an amenable number.

136243277 is a deficient number, since it is larger than the sum of its proper divisors (1).

136243277 is an equidigital number, since it uses as much as digits as its factorization.

136243277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 35.

The square root of 136243277 is about 11672.3295446967. The cubic root of 136243277 is about 514.5627696300.

The spelling of 136243277 in words is "one hundred thirty-six million, two hundred forty-three thousand, two hundred seventy-seven".