168398845 has 8 divisors (see below), whose sum is σ = 202175064. Its totient is φ = 134654784.

The previous prime is 168398837. The next prime is 168398863. The reversal of 168398845 is 548893861.

It can be written as a sum of positive squares in 4 ways, for example, as 1136356 + 167262489 = 1066^2 + 12933^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 168398845 - 2³ = 168398837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 168398792 and 168398801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5587 + ... + 19183.

It is an arithmetic number, because the mean of its divisors is an integer number (25271883).

Almost surely, 2^168398845 is an apocalyptic number.

It is an amenable number.

168398845 is a deficient number, since it is larger than the sum of its proper divisors (33776219).

168398845 is a wasteful number, since it uses less digits than its factorization.

168398845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16079.

The product of its digits is 1658880, while the sum is 52.

The square root of 168398845 is about 12976.8580557853. The cubic root of 168398845 is about 552.2211501419.

The spelling of 168398845 in words is "one hundred sixty-eight million, three hundred ninety-eight thousand, eight hundred forty-five".