168611101 has 2 divisors, whose sum is σ = 168611102. Its totient is φ = 168611100.

The previous prime is 168611099. The next prime is 168611129. The reversal of 168611101 is 101116861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92659876 + 75951225 = 9626^2 + 8715^2 .

It is a cyclic number.

It is not a de Polignac number, because 168611101 - 2¹ = 168611099 is a prime.

Together with 168611099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168611501) 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, 84305550 + 84305551.

It is an arithmetic number, because the mean of its divisors is an integer number (84305551).

Almost surely, 2^168611101 is an apocalyptic number.

It is an amenable number.

168611101 is a deficient number, since it is larger than the sum of its proper divisors (1).

168611101 is an equidigital number, since it uses as much as digits as its factorization.

168611101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 25.

The square root of 168611101 is about 12985.0337311845. The cubic root of 168611101 is about 552.4530659066.

Adding to 168611101 its reverse (101116861), we get a palindrome (269727962).

The spelling of 168611101 in words is "one hundred sixty-eight million, six hundred eleven thousand, one hundred one".