168293945 has 8 divisors (see below), whose sum is σ = 207411144. Its totient is φ = 130996224.

The previous prime is 168293899. The next prime is 168294011. The reversal of 168293945 is 549392861.

It can be written as a sum of positive squares in 4 ways, for example, as 72097081 + 96196864 = 8491^2 + 9808^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 168293945 - 2¹⁰ = 168292921 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 168293945.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 454664 + ... + 455033.

It is an arithmetic number, because the mean of its divisors is an integer number (25926393).

Almost surely, 2^168293945 is an apocalyptic number.

It is an amenable number.

168293945 is a deficient number, since it is larger than the sum of its proper divisors (39117199).

168293945 is an equidigital number, since it uses as much as digits as its factorization.

168293945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909739.

The product of its digits is 466560, while the sum is 47.

The square root of 168293945 is about 12972.8156157405. The cubic root of 168293945 is about 552.1064620412.

The spelling of 168293945 in words is "one hundred sixty-eight million, two hundred ninety-three thousand, nine hundred forty-five".