168347381 has 8 divisors (see below), whose sum is σ = 170218584. Its totient is φ = 166485760.

The previous prime is 168347371. The next prime is 168347437. The reversal of 168347381 is 183743861.

It can be written as a sum of positive squares in 4 ways, for example, as 48094225 + 120253156 = 6935^2 + 10966^2 .

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 168347381 - 2¹⁰ = 168346357 is a prime.

It is a super-2 number, since 2×168347381² = 56681681379118322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168347321) 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, 36311 + ... + 40683.

It is an arithmetic number, because the mean of its divisors is an integer number (21277323).

Almost surely, 2^168347381 is an apocalyptic number.

It is an amenable number.

168347381 is a deficient number, since it is larger than the sum of its proper divisors (1871203).

168347381 is a wasteful number, since it uses less digits than its factorization.

168347381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4791.

The product of its digits is 96768, while the sum is 41.

The square root of 168347381 is about 12974.8749897639. The cubic root of 168347381 is about 552.1648900474.

The spelling of 168347381 in words is "one hundred sixty-eight million, three hundred forty-seven thousand, three hundred eighty-one".