134020181 has 2 divisors, whose sum is σ = 134020182. Its totient is φ = 134020180.

The previous prime is 134020169. The next prime is 134020213. The reversal of 134020181 is 181020431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132480100 + 1540081 = 11510^2 + 1241^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134020181 is a prime.

It is a super-2 number, since 2×134020181² = 35922817830545522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134020151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67010090 + 67010091.

It is an arithmetic number, because the mean of its divisors is an integer number (67010091).

Almost surely, 2^134020181 is an apocalyptic number.

It is an amenable number.

134020181 is a deficient number, since it is larger than the sum of its proper divisors (1).

134020181 is an equidigital number, since it uses as much as digits as its factorization.

134020181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 134020181 is about 11576.7085564076. The cubic root of 134020181 is about 511.7486826598.

The spelling of 134020181 in words is "one hundred thirty-four million, twenty thousand, one hundred eighty-one".