3813778893 has 8 divisors (see below), whose sum is σ = 5260384800. Its totient is φ = 2454846128.

The previous prime is 3813778889. The next prime is 3813778897. The reversal of 3813778893 is 3988773183.

It is an interprime number because it is at equal distance from previous prime (3813778889) and next prime (3813778897).

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 3813778893 - 2² = 3813778889 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3813778897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21918183 + ... + 21918356.

It is an arithmetic number, because the mean of its divisors is an integer number (657548100).

Almost surely, 2^3813778893 is an apocalyptic number.

It is an amenable number.

3813778893 is a deficient number, since it is larger than the sum of its proper divisors (1446605907).

3813778893 is a wasteful number, since it uses less digits than its factorization.

3813778893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43836571.

The product of its digits is 6096384, while the sum is 57.

The square root of 3813778893 is about 61755.8004806026. The cubic root of 3813778893 is about 1562.3746014607.

The spelling of 3813778893 in words is "three billion, eight hundred thirteen million, seven hundred seventy-eight thousand, eight hundred ninety-three".