168980305 has 16 divisors (see below), whose sum is σ = 220634064. Its totient is φ = 123494400.

The previous prime is 168980299. The next prime is 168980351. The reversal of 168980305 is 503089861.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 23464336 + 145515969 = 4844^2 + 12063^2 .

It is not a de Polignac number, because 168980305 - 2³ = 168980297 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7096 + ... + 19705.

It is an arithmetic number, because the mean of its divisors is an integer number (13789629).

Almost surely, 2^168980305 is an apocalyptic number.

It is an amenable number.

168980305 is a deficient number, since it is larger than the sum of its proper divisors (51653759).

168980305 is a wasteful number, since it uses less digits than its factorization.

168980305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26916.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 168980305 is about 12999.2424779292. The cubic root of 168980305 is about 552.8560033698.

The spelling of 168980305 in words is "one hundred sixty-eight million, nine hundred eighty thousand, three hundred five".