168173381 has 8 divisors (see below), whose sum is σ = 169632000. Its totient is φ = 166719600.

The previous prime is 168173371. The next prime is 168173393. The reversal of 168173381 is 183371861.

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 168173381 - 2¹⁰ = 168172357 is a prime.

It is a super-2 number, since 2×168173381² = 56564572153942322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168173311) 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, 107795 + ... + 109343.

It is an arithmetic number, because the mean of its divisors is an integer number (21204000).

Almost surely, 2^168173381 is an apocalyptic number.

It is an amenable number.

168173381 is a deficient number, since it is larger than the sum of its proper divisors (1458619).

168173381 is a wasteful number, since it uses less digits than its factorization.

168173381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2419.

The product of its digits is 24192, while the sum is 38.

The square root of 168173381 is about 12968.1679893499. The cubic root of 168173381 is about 551.9745894713.

The spelling of 168173381 in words is "one hundred sixty-eight million, one hundred seventy-three thousand, three hundred eighty-one".