168963381 has 8 divisors (see below), whose sum is σ = 250316160. Its totient is φ = 112642236.

The previous prime is 168963341. The next prime is 168963437. The reversal of 168963381 is 183369861.

It is a happy number.

168963381 is a `hidden beast` number, since 1 + 6 + 8 + 9 + 633 + 8 + 1 = 666.

It is not a de Polignac number, because 168963381 - 2¹⁴ = 168946997 is a prime.

It is a super-2 number, since 2×168963381² = 57097248237902322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168963331) 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, 3128925 + ... + 3128978.

It is an arithmetic number, because the mean of its divisors is an integer number (31289520).

Almost surely, 2^168963381 is an apocalyptic number.

It is an amenable number.

168963381 is a deficient number, since it is larger than the sum of its proper divisors (81352779).

168963381 is an equidigital number, since it uses as much as digits as its factorization.

168963381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6257912 (or 6257906 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 168963381 is about 12998.5915006204. The cubic root of 168963381 is about 552.8375458985.

The spelling of 168963381 in words is "one hundred sixty-eight million, nine hundred sixty-three thousand, three hundred eighty-one".