168013387 has 4 divisors (see below), whose sum is σ = 168134040. Its totient is φ = 167892736.

The previous prime is 168013381. The next prime is 168013403. The reversal of 168013387 is 783310861.

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

It is a cyclic number.

It is not a de Polignac number, because 168013387 - 2¹⁵ = 167980619 is a prime.

It is a super-2 number, since 2×168013387² = 56456996422423538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168013381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58213 + ... + 61030.

It is an arithmetic number, because the mean of its divisors is an integer number (42033510).

Almost surely, 2^168013387 is an apocalyptic number.

168013387 is a deficient number, since it is larger than the sum of its proper divisors (120653).

168013387 is a wasteful number, since it uses less digits than its factorization.

168013387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120652.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 168013387 is about 12961.9978012651. The cubic root of 168013387 is about 551.7994911242.

The spelling of 168013387 in words is "one hundred sixty-eight million, thirteen thousand, three hundred eighty-seven".