3778987871 has 2 divisors, whose sum is σ = 3778987872. Its totient is φ = 3778987870.

The previous prime is 3778987853. The next prime is 3778987873. The reversal of 3778987871 is 1787898773.

It is a strong prime.

It is an emirp because it is prime and its reverse (1787898773) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3778987871 - 2²² = 3774793567 is a prime.

It is a super-3 number, since 3×3778987871³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 3778987873, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 3778987798 and 3778987807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3778987873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1889493935 + 1889493936.

It is an arithmetic number, because the mean of its divisors is an integer number (1889493936).

Almost surely, 2^3778987871 is an apocalyptic number.

3778987871 is a deficient number, since it is larger than the sum of its proper divisors (1).

3778987871 is an equidigital number, since it uses as much as digits as its factorization.

3778987871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33191424, while the sum is 65.

The square root of 3778987871 is about 61473.4729049856. The cubic root of 3778987871 is about 1557.6091844442.

The spelling of 3778987871 in words is "three billion, seven hundred seventy-eight million, nine hundred eighty-seven thousand, eight hundred seventy-one".