3368681993 has 4 divisors (see below), whose sum is σ = 3378678420. Its totient is φ = 3358685568.

The previous prime is 3368681977. The next prime is 3368681999. The reversal of 3368681993 is 3991868633.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3991868633 = 4523 ⋅882571.

It can be written as a sum of positive squares in 2 ways, for example, as 1860369424 + 1508312569 = 43132^2 + 38837^2 .

It is a cyclic number.

It is not a de Polignac number, because 3368681993 - 2⁴ = 3368681977 is a prime.

It is a super-2 number, since 2×3368681993² = 22696036739924904098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3368681999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4997708 + ... + 4998381.

It is an arithmetic number, because the mean of its divisors is an integer number (844669605).

Almost surely, 2^3368681993 is an apocalyptic number.

It is an amenable number.

3368681993 is a deficient number, since it is larger than the sum of its proper divisors (9996427).

3368681993 is an equidigital number, since it uses as much as digits as its factorization.

3368681993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9996426.

The product of its digits is 5038848, while the sum is 56.

The square root of 3368681993 is about 58040.3479744910. The cubic root of 3368681993 is about 1499.0634142895.

The spelling of 3368681993 in words is "three billion, three hundred sixty-eight million, six hundred eighty-one thousand, nine hundred ninety-three".