143688161 has 2 divisors, whose sum is σ = 143688162. Its totient is φ = 143688160.

The previous prime is 143688157. The next prime is 143688173. The reversal of 143688161 is 161886341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104550625 + 39137536 = 10225^2 + 6256^2 .

It is an emirp because it is prime and its reverse (161886341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 143688161 - 2² = 143688157 is a prime.

It is a super-2 number, since 2×143688161² = 41292575223123842, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (143688121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71844080 + 71844081.

It is an arithmetic number, because the mean of its divisors is an integer number (71844081).

Almost surely, 2^143688161 is an apocalyptic number.

It is an amenable number.

143688161 is a deficient number, since it is larger than the sum of its proper divisors (1).

143688161 is an equidigital number, since it uses as much as digits as its factorization.

143688161 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 143688161 is about 11986.9996663052. Note that the first 3 decimals coincide. The cubic root of 143688161 is about 523.7696492041.

The spelling of 143688161 in words is "one hundred forty-three million, six hundred eighty-eight thousand, one hundred sixty-one".