168320887 has 4 divisors (see below), whose sum is σ = 192366736. Its totient is φ = 144275040.

The previous prime is 168320857. The next prime is 168320903. The reversal of 168320887 is 788023861.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 788023861 = 23 ⋅34261907.

It is a de Polignac number, because none of the positive numbers 2^k-168320887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168320827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12022914 + ... + 12022927.

It is an arithmetic number, because the mean of its divisors is an integer number (48091684).

Almost surely, 2^168320887 is an apocalyptic number.

168320887 is a deficient number, since it is larger than the sum of its proper divisors (24045849).

168320887 is an equidigital number, since it uses as much as digits as its factorization.

168320887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24045848.

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 168320887 is about 12973.8539763634. The cubic root of 168320887 is about 552.1359225161.

The spelling of 168320887 in words is "one hundred sixty-eight million, three hundred twenty thousand, eight hundred eighty-seven".