168006931 has 4 divisors (see below), whose sum is σ = 169493832. Its totient is φ = 166520032.

The previous prime is 168006929. The next prime is 168006941. The reversal of 168006931 is 139600861.

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 168006931 - 2¹ = 168006929 is a prime.

It is a super-2 number, since 2×168006931² = 56452657728077522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168006941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 743281 + ... + 743506.

It is an arithmetic number, because the mean of its divisors is an integer number (42373458).

Almost surely, 2^168006931 is an apocalyptic number.

168006931 is a deficient number, since it is larger than the sum of its proper divisors (1486901).

168006931 is a wasteful number, since it uses less digits than its factorization.

168006931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1486900.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 168006931 is about 12961.7487631878. The cubic root of 168006931 is about 551.7924233082.

The spelling of 168006931 in words is "one hundred sixty-eight million, six thousand, nine hundred thirty-one".