136223777 has 2 divisors, whose sum is σ = 136223778. Its totient is φ = 136223776.

The previous prime is 136223761. The next prime is 136223803. The reversal of 136223777 is 777322631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131423296 + 4800481 = 11464^2 + 2191^2 .

It is an emirp because it is prime and its reverse (777322631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136223777 - 2⁴ = 136223761 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 136223777.

It is not a weakly prime, because it can be changed into another prime (136223177) 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, 68111888 + 68111889.

It is an arithmetic number, because the mean of its divisors is an integer number (68111889).

Almost surely, 2^136223777 is an apocalyptic number.

It is an amenable number.

136223777 is a deficient number, since it is larger than the sum of its proper divisors (1).

136223777 is an equidigital number, since it uses as much as digits as its factorization.

136223777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 74088, while the sum is 38.

The square root of 136223777 is about 11671.4942059704. The cubic root of 136223777 is about 514.5382192987.

The spelling of 136223777 in words is "one hundred thirty-six million, two hundred twenty-three thousand, seven hundred seventy-seven".