168419851 has 2 divisors, whose sum is σ = 168419852. Its totient is φ = 168419850.

The previous prime is 168419837. The next prime is 168419887. The reversal of 168419851 is 158914861.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168419851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 168419798 and 168419807.

It is not a weakly prime, because it can be changed into another prime (168419891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84209925 + 84209926.

It is an arithmetic number, because the mean of its divisors is an integer number (84209926).

Almost surely, 2^168419851 is an apocalyptic number.

168419851 is a deficient number, since it is larger than the sum of its proper divisors (1).

168419851 is an equidigital number, since it uses as much as digits as its factorization.

168419851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 43.

The square root of 168419851 is about 12977.6673944126. The cubic root of 168419851 is about 552.2441104641.

The spelling of 168419851 in words is "one hundred sixty-eight million, four hundred nineteen thousand, eight hundred fifty-one".