168381437 has 8 divisors (see below), whose sum is σ = 192600000. Its totient is φ = 144203904.

The previous prime is 168381391. The next prime is 168381463. The reversal of 168381437 is 734183861.

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 168381437 - 2²⁶ = 101272573 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 168381394 and 168381403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168381637) 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, 887 + ... + 18372.

It is an arithmetic number, because the mean of its divisors is an integer number (24075000).

Almost surely, 2^168381437 is an apocalyptic number.

It is an amenable number.

168381437 is a deficient number, since it is larger than the sum of its proper divisors (24218563).

168381437 is a wasteful number, since it uses less digits than its factorization.

168381437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20515.

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

The square root of 168381437 is about 12976.1873059848. The cubic root of 168381437 is about 552.2021211178.

The spelling of 168381437 in words is "one hundred sixty-eight million, three hundred eighty-one thousand, four hundred thirty-seven".