168648842 has 4 divisors (see below), whose sum is σ = 252973266. Its totient is φ = 84324420.

The previous prime is 168648841. The next prime is 168648871. The reversal of 168648842 is 248846861.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 165148201 + 3500641 = 12851^2 + 1871^2 .

It is not an unprimeable number, because it can be changed into a prime (168648841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42162209 + ... + 42162212.

Almost surely, 2^168648842 is an apocalyptic number.

168648842 is a deficient number, since it is larger than the sum of its proper divisors (84324424).

168648842 is an equidigital number, since it uses as much as digits as its factorization.

168648842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84324423.

The product of its digits is 589824, while the sum is 47.

The square root of 168648842 is about 12986.4868998509. The cubic root of 168648842 is about 552.4942822037.

The spelling of 168648842 in words is "one hundred sixty-eight million, six hundred forty-eight thousand, eight hundred forty-two".