136742777 has 2 divisors, whose sum is σ = 136742778. Its totient is φ = 136742776.

The previous prime is 136742729. The next prime is 136742783. The reversal of 136742777 is 777247631.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99520576 + 37222201 = 9976^2 + 6101^2 .

It is a cyclic number.

It is not a de Polignac number, because 136742777 - 2²⁴ = 119965561 is a prime.

It is not a weakly prime, because it can be changed into another prime (136741777) 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, 68371388 + 68371389.

It is an arithmetic number, because the mean of its divisors is an integer number (68371389).

Almost surely, 2^136742777 is an apocalyptic number.

It is an amenable number.

136742777 is a deficient number, since it is larger than the sum of its proper divisors (1).

136742777 is an equidigital number, since it uses as much as digits as its factorization.

136742777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345744, while the sum is 44.

The square root of 136742777 is about 11693.7067262695. The cubic root of 136742777 is about 515.1908388789.

It can be divided in two parts, 1367 and 42777, that added together give a palindrome (44144).

The spelling of 136742777 in words is "one hundred thirty-six million, seven hundred forty-two thousand, seven hundred seventy-seven".