168491105 has 4 divisors (see below), whose sum is σ = 202189332. Its totient is φ = 134792880.

The previous prime is 168491087. The next prime is 168491159. The reversal of 168491105 is 501194861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501194861 = 4259 ⋅117679.

It can be written as a sum of positive squares in 2 ways, for example, as 134467216 + 34023889 = 11596^2 + 5833^2 .

It is not a de Polignac number, because 168491105 - 2⁸ = 168490849 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16849106 + ... + 16849115.

It is an arithmetic number, because the mean of its divisors is an integer number (50547333).

Almost surely, 2^168491105 is an apocalyptic number.

It is an amenable number.

168491105 is a deficient number, since it is larger than the sum of its proper divisors (33698227).

168491105 is an equidigital number, since it uses as much as digits as its factorization.

168491105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33698226.

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 168491105 is about 12980.4123586271. The cubic root of 168491105 is about 552.3219794597.

The spelling of 168491105 in words is "one hundred sixty-eight million, four hundred ninety-one thousand, one hundred five".