168861149 has 2 divisors, whose sum is σ = 168861150. Its totient is φ = 168861148.

The previous prime is 168861109. The next prime is 168861169. The reversal of 168861149 is 941168861.

168861149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141372100 + 27489049 = 11890^2 + 5243^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168861149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168861109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84430574 + 84430575.

It is an arithmetic number, because the mean of its divisors is an integer number (84430575).

Almost surely, 2^168861149 is an apocalyptic number.

It is an amenable number.

168861149 is a deficient number, since it is larger than the sum of its proper divisors (1).

168861149 is an equidigital number, since it uses as much as digits as its factorization.

168861149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 44.

The square root of 168861149 is about 12994.6584795446. The cubic root of 168861149 is about 552.7260245140.

The spelling of 168861149 in words is "one hundred sixty-eight million, eight hundred sixty-one thousand, one hundred forty-nine".