136078777 has 2 divisors, whose sum is σ = 136078778. Its totient is φ = 136078776.

The previous prime is 136078769. The next prime is 136078783. The reversal of 136078777 is 777870631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135978921 + 99856 = 11661^2 + 316^2 .

It is a cyclic number.

It is not a de Polignac number, because 136078777 - 2³ = 136078769 is a prime.

It is not a weakly prime, because it can be changed into another prime (136078717) 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, 68039388 + 68039389.

It is an arithmetic number, because the mean of its divisors is an integer number (68039389).

Almost surely, 2^136078777 is an apocalyptic number.

It is an amenable number.

136078777 is a deficient number, since it is larger than the sum of its proper divisors (1).

136078777 is an equidigital number, since it uses as much as digits as its factorization.

136078777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345744, while the sum is 46.

The square root of 136078777 is about 11665.2808367394. The cubic root of 136078777 is about 514.3555920299.

The spelling of 136078777 in words is "one hundred thirty-six million, seventy-eight thousand, seven hundred seventy-seven".