168509361 has 8 divisors (see below), whose sum is σ = 226394784. Its totient is φ = 111481760.

The previous prime is 168509357. The next prime is 168509377. The reversal of 168509361 is 163905861.

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 168509361 - 2² = 168509357 is a prime.

It is not an unprimeable number, because it can be changed into a prime (168509351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213996 + ... + 214781.

It is an arithmetic number, because the mean of its divisors is an integer number (28299348).

Almost surely, 2^168509361 is an apocalyptic number.

It is an amenable number.

168509361 is a deficient number, since it is larger than the sum of its proper divisors (57885423).

168509361 is a wasteful number, since it uses less digits than its factorization.

168509361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428911.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 168509361 is about 12981.1155529870. The cubic root of 168509361 is about 552.3419267558.

The spelling of 168509361 in words is "one hundred sixty-eight million, five hundred nine thousand, three hundred sixty-one".