135670181 has 2 divisors, whose sum is σ = 135670182. Its totient is φ = 135670180.

The previous prime is 135670159. The next prime is 135670187. The reversal of 135670181 is 181076531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95550625 + 40119556 = 9775^2 + 6334^2 .

It is a cyclic number.

It is not a de Polignac number, because 135670181 - 2¹⁸ = 135408037 is a prime.

It is a super-2 number, since 2×135670181² = 36812796025145522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135670187) 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, 67835090 + 67835091.

It is an arithmetic number, because the mean of its divisors is an integer number (67835091).

Almost surely, 2^135670181 is an apocalyptic number.

It is an amenable number.

135670181 is a deficient number, since it is larger than the sum of its proper divisors (1).

135670181 is an equidigital number, since it uses as much as digits as its factorization.

135670181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 135670181 is about 11647.7543329176. The cubic root of 135670181 is about 513.8402671509.

The spelling of 135670181 in words is "one hundred thirty-five million, six hundred seventy thousand, one hundred eighty-one".