168531867 has 32 divisors (see below), whose sum is σ = 289625600. Its totient is φ = 94859424.

The previous prime is 168531851. The next prime is 168531889. The reversal of 168531867 is 768135861.

It is not a de Polignac number, because 168531867 - 2⁴ = 168531851 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168536867) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6009 + ... + 19317.

It is an arithmetic number, because the mean of its divisors is an integer number (9050800).

Almost surely, 2^168531867 is an apocalyptic number.

168531867 is a deficient number, since it is larger than the sum of its proper divisors (121093733).

168531867 is a wasteful number, since it uses less digits than its factorization.

168531867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13392 (or 13386 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 168531867 is about 12981.9823986940. The cubic root of 168531867 is about 552.3665158032.

The spelling of 168531867 in words is "one hundred sixty-eight million, five hundred thirty-one thousand, eight hundred sixty-seven".