136816481 has 2 divisors, whose sum is σ = 136816482. Its totient is φ = 136816480.

The previous prime is 136816451. The next prime is 136816487. The reversal of 136816481 is 184618631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133980625 + 2835856 = 11575^2 + 1684^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136816481 is a prime.

It is a super-2 number, since 2×136816481² = 37437498946446722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (136816487) 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, 68408240 + 68408241.

It is an arithmetic number, because the mean of its divisors is an integer number (68408241).

Almost surely, 2^136816481 is an apocalyptic number.

It is an amenable number.

136816481 is a deficient number, since it is larger than the sum of its proper divisors (1).

136816481 is an equidigital number, since it uses as much as digits as its factorization.

136816481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 38.

The square root of 136816481 is about 11696.8577404361. The cubic root of 136816481 is about 515.2833844262.

The spelling of 136816481 in words is "one hundred thirty-six million, eight hundred sixteen thousand, four hundred eighty-one".