3877997779 has 2 divisors, whose sum is σ = 3877997780. Its totient is φ = 3877997778.

The previous prime is 3877997771. The next prime is 3877997797. The reversal of 3877997779 is 9777997783.

Together with next prime (3877997797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (9777997783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3877997779 - 2³ = 3877997771 is a prime.

It is not a weakly prime, because it can be changed into another prime (3877997771) 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 as a sum of consecutive naturals, namely, 1938998889 + 1938998890.

It is an arithmetic number, because the mean of its divisors is an integer number (1938998890).

Almost surely, 2^3877997779 is an apocalyptic number.

3877997779 is a deficient number, since it is larger than the sum of its proper divisors (1).

3877997779 is an equidigital number, since it uses as much as digits as its factorization.

3877997779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 294055272, while the sum is 73.

The square root of 3877997779 is about 62273.5720751588. The cubic root of 3877997779 is about 1571.0952611444.

The spelling of 3877997779 in words is "three billion, eight hundred seventy-seven million, nine hundred ninety-seven thousand, seven hundred seventy-nine".