168318937 has 12 divisors (see below), whose sum is σ = 173962404. Its totient is φ = 162799520.

The previous prime is 168318907. The next prime is 168318971. The reversal of 168318937 is 739813861.

It can be written as a sum of positive squares in 2 ways, for example, as 87965641 + 80353296 = 9379^2 + 8964^2 .

It is not a de Polignac number, because 168318937 - 2¹⁵ = 168286169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168318907) 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 11 ways as a sum of consecutive naturals, for example, 364887 + ... + 365347.

It is an arithmetic number, because the mean of its divisors is an integer number (14496867).

Almost surely, 2^168318937 is an apocalyptic number.

It is an amenable number.

168318937 is a deficient number, since it is larger than the sum of its proper divisors (5643467).

168318937 is an frugal number, since it uses more digits than its factorization.

168318937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680 (or 597 counting only the distinct ones).

The product of its digits is 217728, while the sum is 46.

The square root of 168318937 is about 12973.7788249993. The cubic root of 168318937 is about 552.1337903402.

The spelling of 168318937 in words is "one hundred sixty-eight million, three hundred eighteen thousand, nine hundred thirty-seven".