168591103 has 4 divisors (see below), whose sum is σ = 169918720. Its totient is φ = 167263488.

The previous prime is 168591079. The next prime is 168591107. The reversal of 168591103 is 301195861.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 168591103 - 2¹⁷ = 168460031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168591107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 663618 + ... + 663871.

It is an arithmetic number, because the mean of its divisors is an integer number (42479680).

Almost surely, 2^168591103 is an apocalyptic number.

168591103 is a deficient number, since it is larger than the sum of its proper divisors (1327617).

168591103 is a wasteful number, since it uses less digits than its factorization.

168591103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327616.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 168591103 is about 12984.2636679944. The cubic root of 168591103 is about 552.4312239418.

The spelling of 168591103 in words is "one hundred sixty-eight million, five hundred ninety-one thousand, one hundred three".