168910193 has 4 divisors (see below), whose sum is σ = 169302528. Its totient is φ = 168517860.

The previous prime is 168910169. The next prime is 168910219. The reversal of 168910193 is 391019861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 391019861 = 991 ⋅394571.

It is a cyclic number.

It is not a de Polignac number, because 168910193 - 2¹⁸ = 168648049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168910153) 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 in 3 ways as a sum of consecutive naturals, for example, 195521 + ... + 196382.

It is an arithmetic number, because the mean of its divisors is an integer number (42325632).

Almost surely, 2^168910193 is an apocalyptic number.

It is an amenable number.

168910193 is a deficient number, since it is larger than the sum of its proper divisors (392335).

168910193 is an equidigital number, since it uses as much as digits as its factorization.

168910193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392334.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 168910193 is about 12996.5454256121. The cubic root of 168910193 is about 552.7795305480.

The spelling of 168910193 in words is "one hundred sixty-eight million, nine hundred ten thousand, one hundred ninety-three".