1968694181 has 8 divisors (see below), whose sum is σ = 1993232640. Its totient is φ = 1944175392.

The previous prime is 1968694099. The next prime is 1968694193. The reversal of 1968694181 is 1814968691.

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 1968694181 - 2¹⁰ = 1968693157 is a prime.

It is a super-2 number, since 2×1968694181² = 7751513556606521522, 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 (1968696181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 382481 + ... + 387593.

It is an arithmetic number, because the mean of its divisors is an integer number (249154080).

Almost surely, 2^1968694181 is an apocalyptic number.

It is an amenable number.

1968694181 is a deficient number, since it is larger than the sum of its proper divisors (24538459).

1968694181 is an equidigital number, since it uses as much as digits as its factorization.

1968694181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9835.

The product of its digits is 746496, while the sum is 53.

The square root of 1968694181 is about 44369.9693599173. The cubic root of 1968694181 is about 1253.3126386651.

The spelling of 1968694181 in words is "one billion, nine hundred sixty-eight million, six hundred ninety-four thousand, one hundred eighty-one".