133841161 has 2 divisors, whose sum is σ = 133841162. Its totient is φ = 133841160.

The previous prime is 133841083. The next prime is 133841189. The reversal of 133841161 is 161148331.

133841161 = 8180² + 8181².

It is an a-pointer prime, because the next prime (133841189) can be obtained adding 133841161 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66928761 + 66912400 = 8181^2 + 8180^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133841161 is a prime.

It is not a weakly prime, because it can be changed into another prime (133845161) 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, 66920580 + 66920581.

It is an arithmetic number, because the mean of its divisors is an integer number (66920581).

Almost surely, 2^133841161 is an apocalyptic number.

133841161 is the 8181-st centered square number.

It is an amenable number.

133841161 is a deficient number, since it is larger than the sum of its proper divisors (1).

133841161 is an equidigital number, since it uses as much as digits as its factorization.

133841161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 28.

The square root of 133841161 is about 11568.9740686026. The cubic root of 133841161 is about 511.5207217906.

Adding to 133841161 its reverse (161148331), we get a palindrome (294989492).

The spelling of 133841161 in words is "one hundred thirty-three million, eight hundred forty-one thousand, one hundred sixty-one".