168438897 has 36 divisors (see below), whose sum is σ = 269620260. Its totient is φ = 101249280.

The previous prime is 168438877. The next prime is 168438943. The reversal of 168438897 is 798834861.

It can be written as a sum of positive squares in 2 ways, for example, as 51279921 + 117158976 = 7161^2 + 10824^2 .

It is not a de Polignac number, because 168438897 - 2⁶ = 168438833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (168438827) 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 35 ways as a sum of consecutive naturals, for example, 148629 + ... + 149757.

Almost surely, 2^168438897 is an apocalyptic number.

It is an amenable number.

168438897 is a deficient number, since it is larger than the sum of its proper divisors (101181363).

168438897 is a wasteful number, since it uses less digits than its factorization.

168438897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294 (or 1280 counting only the distinct ones).

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

The square root of 168438897 is about 12978.4011727177. The cubic root of 168438897 is about 552.2649267847.

The spelling of 168438897 in words is "one hundred sixty-eight million, four hundred thirty-eight thousand, eight hundred ninety-seven".