168381827 has 4 divisors (see below), whose sum is σ = 175702800. Its totient is φ = 161060856.

The previous prime is 168381823. The next prime is 168381833. The reversal of 168381827 is 728183861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 728183861 = 8093 ⋅89977.

It is a cyclic number.

It is not a de Polignac number, because 168381827 - 2² = 168381823 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168381823) 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 in 3 ways as a sum of consecutive naturals, for example, 3660452 + ... + 3660497.

It is an arithmetic number, because the mean of its divisors is an integer number (43925700).

Almost surely, 2^168381827 is an apocalyptic number.

168381827 is a deficient number, since it is larger than the sum of its proper divisors (7320973).

168381827 is an equidigital number, since it uses as much as digits as its factorization.

168381827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7320972.

The product of its digits is 129024, while the sum is 44.

The square root of 168381827 is about 12976.2023335027. The cubic root of 168381827 is about 552.2025474488.

The spelling of 168381827 in words is "one hundred sixty-eight million, three hundred eighty-one thousand, eight hundred twenty-seven".