136776817 has 2 divisors, whose sum is σ = 136776818. Its totient is φ = 136776816.

The previous prime is 136776811. The next prime is 136776833. The reversal of 136776817 is 718677631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118722816 + 18054001 = 10896^2 + 4249^2 .

It is a cyclic number.

It is not a de Polignac number, because 136776817 - 2¹¹ = 136774769 is a prime.

It is not a weakly prime, because it can be changed into another prime (136776811) 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, 68388408 + 68388409.

It is an arithmetic number, because the mean of its divisors is an integer number (68388409).

Almost surely, 2^136776817 is an apocalyptic number.

It is an amenable number.

136776817 is a deficient number, since it is larger than the sum of its proper divisors (1).

136776817 is an equidigital number, since it uses as much as digits as its factorization.

136776817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352, while the sum is 46.

The square root of 136776817 is about 11695.1621194407. The cubic root of 136776817 is about 515.2335849299.

The spelling of 136776817 in words is "one hundred thirty-six million, seven hundred seventy-six thousand, eight hundred seventeen".