168356749 has 8 divisors (see below), whose sum is σ = 184488192. Its totient is φ = 152363040.

The previous prime is 168356743. The next prime is 168356801. The reversal of 168356749 is 947653861.

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 168356749 - 2⁵ = 168356717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168356743) 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 7 ways as a sum of consecutive naturals, for example, 31864 + ... + 36769.

It is an arithmetic number, because the mean of its divisors is an integer number (23061024).

Almost surely, 2^168356749 is an apocalyptic number.

It is an amenable number.

168356749 is a deficient number, since it is larger than the sum of its proper divisors (16131443).

168356749 is a wasteful number, since it uses less digits than its factorization.

168356749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68867.

The product of its digits is 1088640, while the sum is 49.

The square root of 168356749 is about 12975.2359901468. The cubic root of 168356749 is about 552.1751319347.

The spelling of 168356749 in words is "one hundred sixty-eight million, three hundred fifty-six thousand, seven hundred forty-nine".