168386413 has 18 divisors (see below), whose sum is σ = 187538442. Its totient is φ = 150294240.

The previous prime is 168386401. The next prime is 168386419. The reversal of 168386413 is 314683861.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 26347689 + 142038724 = 5133^2 + 11918^2 .

It is not a de Polignac number, because 168386413 - 2²¹ = 166289261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168386419) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2760403 + ... + 2760463.

Almost surely, 2^168386413 is an apocalyptic number.

168386413 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

168386413 is a deficient number, since it is larger than the sum of its proper divisors (19152029).

168386413 is an frugal number, since it uses more digits than its factorization.

168386413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253 (or 133 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The square root of 168386413 is about 12976.3790403949. The cubic root of 168386413 is about 552.2075606143.

The spelling of 168386413 in words is "one hundred sixty-eight million, three hundred eighty-six thousand, four hundred thirteen".