168493887 has 12 divisors (see below), whose sum is σ = 249316704. Its totient is φ = 109589280.

The previous prime is 168493879. The next prime is 168493921. The reversal of 168493887 is 788394861.

It is not a de Polignac number, because 168493887 - 2³ = 168493879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168493867) 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 11 ways as a sum of consecutive naturals, for example, 227943 + ... + 228680.

It is an arithmetic number, because the mean of its divisors is an integer number (20776392).

Almost surely, 2^168493887 is an apocalyptic number.

168493887 is a deficient number, since it is larger than the sum of its proper divisors (80822817).

168493887 is a wasteful number, since it uses less digits than its factorization.

168493887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456670 (or 456667 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 168493887 is about 12980.5195196494. The cubic root of 168493887 is about 552.3250192864.

It can be divided in two parts, 16849 and 3887, that added together give a 4-th power (20736 = 12⁴).

The spelling of 168493887 in words is "one hundred sixty-eight million, four hundred ninety-three thousand, eight hundred eighty-seven".