168637349 has 4 divisors (see below), whose sum is σ = 174452460. Its totient is φ = 162822240.

The previous prime is 168637333. The next prime is 168637351. The reversal of 168637349 is 943736861.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 44649124 + 123988225 = 6682^2 + 11135^2 .

It is not a de Polignac number, because 168637349 - 2⁴ = 168637333 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 (168637309) 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 3 ways as a sum of consecutive naturals, for example, 2907512 + ... + 2907569.

It is an arithmetic number, because the mean of its divisors is an integer number (43613115).

Almost surely, 2^168637349 is an apocalyptic number.

It is an amenable number.

168637349 is a deficient number, since it is larger than the sum of its proper divisors (5815111).

168637349 is an equidigital number, since it uses as much as digits as its factorization.

168637349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5815110.

The product of its digits is 653184, while the sum is 47.

The square root of 168637349 is about 12986.0443938868. The cubic root of 168637349 is about 552.4817315472.

The spelling of 168637349 in words is "one hundred sixty-eight million, six hundred thirty-seven thousand, three hundred forty-nine".