13608181 has 2 divisors, whose sum is σ = 13608182. Its totient is φ = 13608180.

The previous prime is 13608151. The next prime is 13608209. The reversal of 13608181 is 18180631.

It is a happy number.

It is an a-pointer prime, because the next prime (13608209) can be obtained adding 13608181 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., 13032100 + 576081 = 3610^2 + 759^2 .

It is a cyclic number.

It is not a de Polignac number, because 13608181 - 2¹⁹ = 13083893 is a prime.

It is a super-2 number, since 2×13608181² = 370365180257522, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 7.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13608131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6804090 + 6804091.

It is an arithmetic number, because the mean of its divisors is an integer number (6804091).

Almost surely, 2^13608181 is an apocalyptic number.

It is an amenable number.

13608181 is a deficient number, since it is larger than the sum of its proper divisors (1).

13608181 is an equidigital number, since it uses as much as digits as its factorization.

13608181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 13608181 is about 3688.9268087074. The cubic root of 13608181 is about 238.7444909778.

The spelling of 13608181 in words is "thirteen million, six hundred eight thousand, one hundred eighty-one".