168440105 has 8 divisors (see below), whose sum is σ = 202581000. Its totient is φ = 134450176.

The previous prime is 168440089. The next prime is 168440137. The reversal of 168440105 is 501044861.

It can be written as a sum of positive squares in 4 ways, for example, as 141376 + 168298729 = 376^2 + 12973^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 168440105 - 2⁴ = 168440089 is a prime.

It is a super-2 number, since 2×168440105² = 56744137944822050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35270 + ... + 39759.

It is an arithmetic number, because the mean of its divisors is an integer number (25322625).

Almost surely, 2^168440105 is an apocalyptic number.

It is an amenable number.

168440105 is a deficient number, since it is larger than the sum of its proper divisors (34140895).

168440105 is an equidigital number, since it uses as much as digits as its factorization.

168440105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75483.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 168440105 is about 12978.4477114946. The cubic root of 168440105 is about 552.2662470151.

Adding to 168440105 its reverse (501044861), we get a palindrome (669484966).

The spelling of 168440105 in words is "one hundred sixty-eight million, four hundred forty thousand, one hundred five".