168351972 has 24 divisors (see below), whose sum is σ = 398686176. Its totient is φ = 55279488.

The previous prime is 168351959. The next prime is 168351977. The reversal of 168351972 is 279153861.

It is not an unprimeable number, because it can be changed into a prime (168351977) 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 7 ways as a sum of consecutive naturals, for example, 103893 + ... + 105500.

It is an arithmetic number, because the mean of its divisors is an integer number (16611924).

Almost surely, 2^168351972 is an apocalyptic number.

168351972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

168351972 is an abundant number, since it is smaller than the sum of its proper divisors (230334204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

168351972 is a wasteful number, since it uses less digits than its factorization.

168351972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209467 (or 209465 counting only the distinct ones).

The product of its digits is 90720, while the sum is 42.

The square root of 168351972 is about 12975.0519074106. The cubic root of 168351972 is about 552.1699093631.

The spelling of 168351972 in words is "one hundred sixty-eight million, three hundred fifty-one thousand, nine hundred seventy-two".